feat(lng): Added change language on the fly (#456)

* feat(lng): added change language on the fly

* fixed dropdown

* applied feedbacks

* added translation

* updated bundlesize

* fixed error

* updated snaps

* added french language

* added language in storage

* updated styles

* fixed tests

i18n/config.ts

@@ -8,6 +8,29 @@ import translationDE from './translations/de-DE.json';
 import translationFR from './translations/fr-FR.json';
 import translationCN from './translations/zh-CN.json';
 
+const languages = {
+  'en-US': {
+    translation: translationEN,
+  },
+  'pt-BR': {
+    translation: translationPT,
+  },
+  'es-ES': {
+    translation: translationES,
+  },
+  'de-DE': {
+    translation: translationDE,
+  },
+  'fr-FR': {
+    translation: translationFR,
+  },
+  'zh-CN': {
+    translation: translationCN,
+  },
+};
+
+type Language = keyof typeof languages;
+
 i18n
   // pass the i18n instance to react-i18next.
   .use(initReactI18next)
@@ -19,26 +42,7 @@ i18n
     fallbackLng: 'en-US',
     whitelist: ['en-US', 'pt-BR', 'es-ES', 'de-DE', 'fr-FR', 'zh-CN'],
     load: 'currentOnly',
-    resources: {
+    resources: languages,
-      'en-US': {
-        translation: translationEN,
-      },
-      'pt-BR': {
-        translation: translationPT,
-      },
-      'es-ES': {
-        translation: translationES,
-      },
-      'de-DE': {
-        translation: translationDE,
-      },
-      'fr-FR': {
-        translation: translationFR,
-      },
-      'zh-CN': {
-        translation: translationCN,
-      },
-    },
     debug: false,
     interpolation: {
       escapeValue: false, // react already safes from xss
@@ -46,3 +50,4 @@ i18n
   });
 
 export default i18n;
+export { Language };

i18n/translations/de-DE.json

@@ -135,5 +135,15 @@
         "app-context-not-correct-used": "Der App-Kontext wurde nicht korrekt verwendet",
         "theme-context-not-correct-used": "Der Theme-Kontext wurde nicht korrekt verwendet",
         "package-meta-is-required-at-detail-context": "packageMeta wird bei DetailContext benötigt"
-    }
+    },
+    "lng": {
+        "english": "Englisch",
+        "portuguese": "Portugiesisch",
+        "spanish": "Spanisch",
+        "german": "Deutsch",
+        "chinese": "Chinesisch",
+        "french": "Französisch"
+    },
+    "help-to-translate": "Hilfe beim Übersetzen",
+    "change-language": "Sprache ändern"
 }

i18n/translations/en-US.json

@@ -135,5 +135,15 @@
         "app-context-not-correct-used": "The app context was not used correctly",
         "theme-context-not-correct-used": "The theme context was not used correctly",
         "package-meta-is-required-at-detail-context": "packageMeta is required at DetailContext"
-    }
+    },
+    "lng": {
+        "english": "English",
+        "portuguese": "Portuguese",
+        "spanish": "Spanish",
+        "german": "German",
+        "chinese": "Chinese",
+        "french":  "French"
+    },
+    "help-to-translate": "Help to translate",
+    "change-language": "Change language"
 }

i18n/translations/es-ES.json

@@ -135,5 +135,15 @@
         "app-context-not-correct-used": "El contexto de la aplicación no fue correctamente usado",
         "theme-context-not-correct-used": "El contexto del tema no fue correctamente usado",
         "package-meta-is-required-at-detail-context": "packageMeta es requerido en DetailContext"
-    }
+    },
+    "lng": {
+        "english": "Inglés",
+        "portuguese": "Portugués",
+        "spanish": "Español",
+        "german": "Alemán",
+        "chinese": "Chino",
+        "french": "francés"
+    },
+    "help-to-translate": "Ayuda a traducir",
+    "change-language": "Cambiar idioma"
 }

i18n/translations/fr-FR.json

@@ -135,5 +135,15 @@
         "app-context-not-correct-used": "Le contexte de l'application n'a pas été utilisé correctement",
         "theme-context-not-correct-used": "Le contexte du thème n'a pas été utilisé correctement",
         "package-meta-is-required-at-detail-context": "packageMeta est obligatoire à DetailContext"
-    }
+    },
+    "lng": {
+        "english": "Anglaise",
+        "portuguese": "Portugaise",
+        "spanish": "Espagnol",
+        "german": "Allemande",
+        "chinese": "Chinoise",
+        "french": "Française"
+    },
+    "help-to-translate": "Aide à traduire",
+    "change-language": "Changer la langue"
 }

i18n/translations/pt-BR.json

@@ -114,7 +114,7 @@
         }
     },
     "footer": {
-        "powered-by": "Distribuído por",
+        "powered-by": "Feito por",
         "made-with-love-on": "Feito com amor <0>♥</0> no(a)"
     },
     "button": {
@@ -135,5 +135,15 @@
         "app-context-not-correct-used": "O contexto do aplicativo não foi usado corretamente",
         "theme-context-not-correct-used": "O contexto do tema não foi usado corretamente",
         "package-meta-is-required-at-detail-context": "packageMeta é requerido em DetailContext"
-    }
+    },
+    "lng": {
+        "english": "Inglês",
+        "portuguese": "Português",
+        "spanish": "Espanhol",
+        "german": "Alemão",
+        "chinese": "Chinês",
+        "french": "Francês"
+    },
+    "help-to-translate": "Ajude a traduzir",
+    "change-language": "Mudar idioma"
 }

i18n/translations/zh-CN.json

@@ -134,5 +134,15 @@
         },
         "app-context-not-correct-used": "The app context was not correct used",
         "package-meta-is-required-at-detail-context": "packageMeta is required at DetailContext"
-    }
+    },
+    "lng": {
+        "english": "英語",
+        "portuguese": "葡萄牙語",
+        "spanish": "西班牙文",
+        "german": "德語",
+        "chinese": "中文",
+        "french": "法國人"
+    },
+    "help-to-translate": "幫助翻譯",
+    "change-language": "改變語言"
 }

package.json

@@ -140,7 +140,7 @@
   "bundlesize": [
     {
       "path": "./static/vendors.*.js",
-      "maxSize": "200 kB"
+      "maxSize": "210 kB"
     },
     {
       "path": "./static/main.*.js",

src/App/__snapshots__/App.test.tsx.snap

@@ -1,11 +1,11 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`<App /> should display the Header component  1`] = `
-.emotion-81 {
+.emotion-85 {
   background-color: #fff;
 }
 
-.emotion-24 {
+.emotion-28 {
   background-color: #4b5e40;
   color: #fff;
   min-height: 60px;
@@ -20,29 +20,29 @@ exports[`<App /> should display the Header component  1`] = `
 }
 
 @media (min-width:768px) {
-  .emotion-24 .emotion-13 {
+  .emotion-28 .emotion-13 {
     display: -webkit-box;
     display: -webkit-flex;
     display: -ms-flexbox;
     display: flex;
   }
 
-  .emotion-24 .emotion-17 {
+  .emotion-28 .emotion-17 {
     display: none;
   }
 
-  .emotion-24 .e1jf5lit4 {
+  .emotion-28 .e1jf5lit4 {
     display: none;
   }
 }
 
 @media (min-width:1024px) {
-  .emotion-24 .emotion-23 {
+  .emotion-28 .emotion-27 {
     padding: 0 20px;
   }
 
 @media (min-width:1275px) {
-    .emotion-24 .emotion-23 {
+    .emotion-28 .emotion-27 {
       max-width: 1240px;
       width: 100%;
       margin: 0 auto;
@@ -50,7 +50,7 @@ exports[`<App /> should display the Header component  1`] = `
 }
 }
 
-.emotion-22 {
+.emotion-26 {
   -webkit-box-pack: justify;
   -webkit-justify-content: space-between;
   -ms-flex-pack: justify;
@@ -128,7 +128,7 @@ exports[`<App /> should display the Header component  1`] = `
   overflow-y: auto;
 }
 
-.emotion-20 {
+.emotion-24 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -140,12 +140,32 @@ exports[`<App /> should display the Header component  1`] = `
   display: block;
 }
 
+.emotion-20 {
+  display: none;
+}
+
+@media screen and (min-width:768px) {
+  .emotion-20 {
+    display: inline-block;
+  }
+}
+
 .emotion-18 {
+  display: none;
+}
+
+@media screen and (min-width:768px) {
+  .emotion-18 {
+    display: inline-block;
+  }
+}
+
+.emotion-22 {
   color: #fff;
 }
 
 @media screen and (min-width:1240px) {
-  .emotion-36 {
+  .emotion-40 {
     max-width: 1240px;
     width: 100%;
     margin-left: auto;
@@ -153,7 +173,7 @@ exports[`<App /> should display the Header component  1`] = `
   }
 }
 
-.emotion-79 {
+.emotion-83 {
   background: #f9f9f9;
   border-top: 1px solid #e3e3e3;
   color: #999999;
@@ -161,7 +181,7 @@ exports[`<App /> should display the Header component  1`] = `
   padding: 20px;
 }
 
-.emotion-77 {
+.emotion-81 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -178,7 +198,7 @@ exports[`<App /> should display the Header component  1`] = `
 }
 
 @media (min-width:768px) {
-  .emotion-77 {
+  .emotion-81 {
     min-width: 400px;
     max-width: 800px;
     margin: auto;
@@ -190,12 +210,12 @@ exports[`<App /> should display the Header component  1`] = `
 }
 
 @media (min-width:1024px) {
-  .emotion-77 {
+  .emotion-81 {
     max-width: 1240px;
   }
 }
 
-.emotion-68 {
+.emotion-72 {
   -webkit-align-items: center;
   -webkit-box-align: center;
   -ms-flex-align: center;
@@ -204,7 +224,7 @@ exports[`<App /> should display the Header component  1`] = `
 }
 
 @media (min-width:768px) {
-  .emotion-68 {
+  .emotion-72 {
     display: -webkit-box;
     display: -webkit-flex;
     display: -ms-flexbox;
@@ -212,21 +232,21 @@ exports[`<App /> should display the Header component  1`] = `
   }
 }
 
-.emotion-38 {
+.emotion-42 {
   color: #e25555;
   padding: 0 5px;
 }
 
-.emotion-66 {
+.emotion-70 {
   position: relative;
   height: 18px;
 }
 
-.emotion-66:hover .emotion-65 {
+.emotion-70:hover .emotion-69 {
   visibility: visible;
 }
 
-.emotion-41 {
+.emotion-45 {
   box-sizing: initial;
   display: inline-block;
   cursor: default;
@@ -235,7 +255,7 @@ exports[`<App /> should display the Header component  1`] = `
   padding: 0 10px;
 }
 
-.emotion-64 {
+.emotion-68 {
   position: absolute;
   background: #d3dddd;
   padding: 1px 4px;
@@ -253,7 +273,7 @@ exports[`<App /> should display the Header component  1`] = `
   top: -2px;
 }
 
-.emotion-64:before {
+.emotion-68:before {
   content: '';
   position: absolute;
   top: 29%;
@@ -266,7 +286,7 @@ exports[`<App /> should display the Header component  1`] = `
   transform: rotate(90deg);
 }
 
-.emotion-44 {
+.emotion-48 {
   box-sizing: initial;
   display: inline-block;
   cursor: default;
@@ -275,7 +295,7 @@ exports[`<App /> should display the Header component  1`] = `
   padding: 0 5px;
 }
 
-.emotion-75 {
+.emotion-79 {
   -webkit-align-items: center;
   -webkit-box-align: center;
   -ms-flex-align: center;
@@ -288,7 +308,7 @@ exports[`<App /> should display the Header component  1`] = `
 }
 
 @media (min-width:768px) {
-  .emotion-75 {
+  .emotion-79 {
     display: -webkit-box;
     display: -webkit-flex;
     display: -ms-flexbox;
@@ -296,7 +316,7 @@ exports[`<App /> should display the Header component  1`] = `
   }
 }
 
-.emotion-73 {
+.emotion-77 {
   box-sizing: initial;
   display: inline-block;
   cursor: pointer;
@@ -305,12 +325,12 @@ exports[`<App /> should display the Header component  1`] = `
   padding: 0 5px;
 }
 
-.emotion-70 {
+.emotion-74 {
   width: 100%;
   height: auto;
 }
 
-.emotion-34 {
+.emotion-38 {
   -webkit-transform: translate(-50%,-50%);
   -ms-transform: translate(-50%,-50%);
   transform: translate(-50%,-50%);
@@ -319,14 +339,14 @@ exports[`<App /> should display the Header component  1`] = `
   position: absolute;
 }
 
-.emotion-28 {
+.emotion-32 {
   margin: 0 0 30px 0;
   border-radius: 25px;
   box-shadow: 0 10px 20px 0 rgba(69,58,100,0.2);
   background: #f7f8f6;
 }
 
-.emotion-26 {
+.emotion-30 {
   display: inline-block;
   vertical-align: middle;
   box-sizing: border-box;
@@ -338,7 +358,7 @@ exports[`<App /> should display the Header component  1`] = `
   height: 90px;
 }
 
-.emotion-32 {
+.emotion-36 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -353,19 +373,19 @@ exports[`<App /> should display the Header component  1`] = `
   justify-content: center;
 }
 
-.emotion-30 {
+.emotion-34 {
   color: #4b5e40;
 }
 
 <div
-  class="MuiBox-root MuiBox-root-219 emotion-81 emotion-82"
+  class="MuiBox-root MuiBox-root-220 emotion-85 emotion-86"
 >
   <header
-    class="MuiPaper-root MuiPaper-elevation4 MuiAppBar-root MuiAppBar-positionStatic emotion-24 emotion-25 MuiAppBar-colorPrimary"
+    class="MuiPaper-root MuiPaper-elevation4 MuiAppBar-root MuiAppBar-positionStatic emotion-28 emotion-29 MuiAppBar-colorPrimary"
     data-testid="header"
   >
     <div
-      class="MuiToolbar-root MuiToolbar-regular emotion-22 emotion-23 MuiToolbar-gutters"
+      class="MuiToolbar-root MuiToolbar-regular emotion-26 emotion-27 MuiToolbar-gutters"
     >
       <div
         class="MuiToolbar-root MuiToolbar-regular emotion-14 emotion-15 MuiToolbar-gutters"
@@ -434,7 +454,7 @@ exports[`<App /> should display the Header component  1`] = `
         </div>
       </div>
       <div
-        class="MuiToolbar-root MuiToolbar-regular emotion-20 emotion-21 MuiToolbar-gutters"
+        class="MuiToolbar-root MuiToolbar-regular emotion-24 emotion-25 MuiToolbar-gutters"
         data-testid="header-right"
       >
         <button
@@ -461,8 +481,53 @@ exports[`<App /> should display the Header component  1`] = `
             class="MuiTouchRipple-root"
           />
         </button>
+        <div
+          class="emotion-20 emotion-21"
+        >
+          <button
+            class="MuiButtonBase-root MuiButton-root MuiButton-text MuiButton-colorInherit"
+            tabindex="0"
+            title="Change language"
+            type="button"
+          >
+            <span
+              class="MuiButton-label ForwardRef(Button)-label-339"
+            >
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root"
+                focusable="false"
+                role="presentation"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zm6.93 6h-2.95c-.32-1.25-.78-2.45-1.38-3.56 1.84.63 3.37 1.91 4.33 3.56zM12 4.04c.83 1.2 1.48 2.53 1.91 3.96h-3.82c.43-1.43 1.08-2.76 1.91-3.96zM4.26 14C4.1 13.36 4 12.69 4 12s.1-1.36.26-2h3.38c-.08.66-.14 1.32-.14 2 0 .68.06 1.34.14 2H4.26zm.82 2h2.95c.32 1.25.78 2.45 1.38 3.56-1.84-.63-3.37-1.9-4.33-3.56zm2.95-8H5.08c.96-1.66 2.49-2.93 4.33-3.56C8.81 5.55 8.35 6.75 8.03 8zM12 19.96c-.83-1.2-1.48-2.53-1.91-3.96h3.82c-.43 1.43-1.08 2.76-1.91 3.96zM14.34 14H9.66c-.09-.66-.16-1.32-.16-2 0-.68.07-1.35.16-2h4.68c.09.65.16 1.32.16 2 0 .68-.07 1.34-.16 2zm.25 5.56c.6-1.11 1.06-2.31 1.38-3.56h2.95c-.96 1.65-2.49 2.93-4.33 3.56zM16.36 14c.08-.66.14-1.32.14-2 0-.68-.06-1.34-.14-2h3.38c.16.64.26 1.31.26 2s-.1 1.36-.26 2h-3.38z"
+                />
+              </svg>
+              <span
+                class="emotion-18 emotion-19"
+              >
+                English
+              </span>
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall"
+                focusable="false"
+                role="presentation"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M16.59 8.59L12 13.17 7.41 8.59 6 10l6 6 6-6z"
+                />
+              </svg>
+            </span>
+            <span
+              class="MuiTouchRipple-root"
+            />
+          </button>
+        </div>
         <a
-          class="emotion-18 emotion-19"
+          class="emotion-22 emotion-23"
           data-testid="header--tooltip-documentation"
           href="https://verdaccio.org/docs/en/installation"
           rel="noopener noreferrer"
@@ -566,28 +631,28 @@ exports[`<App /> should display the Header component  1`] = `
     </div>
   </header>
   <div
-    class="MuiBox-root MuiBox-root-412 emotion-36 emotion-37"
+    class="MuiBox-root MuiBox-root-414 emotion-40 emotion-41"
   >
     <div
       class="container content"
       data-testid="home-page-container"
     >
       <div
-        class="emotion-34 emotion-35"
+        class="emotion-38 emotion-39"
         data-testid="loading"
       >
-        <div
-          class="emotion-28 emotion-29"
-        >
-          <div
-            class="emotion-26 emotion-1"
-          />
-        </div>
         <div
           class="emotion-32 emotion-33"
         >
           <div
-            class="MuiCircularProgress-root emotion-30 emotion-31 MuiCircularProgress-colorPrimary MuiCircularProgress-indeterminate"
+            class="emotion-30 emotion-1"
+          />
+        </div>
+        <div
+          class="emotion-36 emotion-37"
+        >
+          <div
+            class="MuiCircularProgress-root emotion-34 emotion-35 MuiCircularProgress-colorPrimary MuiCircularProgress-indeterminate"
             role="progressbar"
             style="width: 50px; height: 50px;"
           >
@@ -610,26 +675,26 @@ exports[`<App /> should display the Header component  1`] = `
     </div>
   </div>
   <div
-    class="emotion-79 emotion-80"
+    class="emotion-83 emotion-84"
   >
     <div
-      class="emotion-77 emotion-78"
+      class="emotion-81 emotion-82"
     >
       <div
-        class="emotion-68 emotion-69"
+        class="emotion-72 emotion-73"
       >
         Made with 
         <span
-          class="emotion-38 emotion-39"
+          class="emotion-42 emotion-43"
         >
           ♥
         </span>
          on
         <span
-          class="emotion-66 emotion-67"
+          class="emotion-70 emotion-71"
         >
           <svg
-            class="emotion-40 emotion-41 emotion-42"
+            class="emotion-44 emotion-45 emotion-46"
           >
             <title>
               Earth
@@ -639,10 +704,10 @@ exports[`<App /> should display the Header component  1`] = `
             />
           </svg>
           <span
-            class="emotion-64 emotion-65"
+            class="emotion-68 emotion-69"
           >
             <svg
-              class="emotion-43 emotion-44 emotion-42"
+              class="emotion-47 emotion-48 emotion-46"
             >
               <title>
                 Spain
@@ -652,7 +717,7 @@ exports[`<App /> should display the Header component  1`] = `
               />
             </svg>
             <svg
-              class="emotion-43 emotion-44 emotion-42"
+              class="emotion-47 emotion-48 emotion-46"
             >
               <title>
                 Nicaragua
@@ -662,7 +727,7 @@ exports[`<App /> should display the Header component  1`] = `
               />
             </svg>
             <svg
-              class="emotion-43 emotion-44 emotion-42"
+              class="emotion-47 emotion-48 emotion-46"
             >
               <title>
                 India
@@ -672,7 +737,7 @@ exports[`<App /> should display the Header component  1`] = `
               />
             </svg>
             <svg
-              class="emotion-43 emotion-44 emotion-42"
+              class="emotion-47 emotion-48 emotion-46"
             >
               <title>
                 Brazil
@@ -682,7 +747,7 @@ exports[`<App /> should display the Header component  1`] = `
               />
             </svg>
             <svg
-              class="emotion-43 emotion-44 emotion-42"
+              class="emotion-47 emotion-48 emotion-46"
             >
               <title>
                 China
@@ -692,7 +757,7 @@ exports[`<App /> should display the Header component  1`] = `
               />
             </svg>
             <svg
-              class="emotion-43 emotion-44 emotion-42"
+              class="emotion-47 emotion-48 emotion-46"
             >
               <title>
                 Austria
@@ -702,7 +767,7 @@ exports[`<App /> should display the Header component  1`] = `
               />
             </svg>
             <svg
-              class="emotion-43 emotion-44 emotion-42"
+              class="emotion-47 emotion-48 emotion-46"
             >
               <title>
                 Germany
@@ -715,16 +780,16 @@ exports[`<App /> should display the Header component  1`] = `
         </span>
       </div>
       <div
-        class="emotion-75 emotion-76"
+        class="emotion-79 emotion-80"
       >
         Powered by
         <span
-          class="emotion-43 emotion-73 emotion-74"
+          class="emotion-47 emotion-77 emotion-78"
           title="Verdaccio"
         >
           <img
             alt="Verdaccio"
-            class="emotion-70 emotion-71"
+            class="emotion-74 emotion-75"
             src="[object Object]"
           />
         </span>
@@ -736,11 +801,11 @@ exports[`<App /> should display the Header component  1`] = `
 `;
 
 exports[`<App /> should display the Loading component at the beginning  1`] = `
-.emotion-71 {
+.emotion-75 {
   background-color: #fff;
 }
 
-.emotion-24 {
+.emotion-28 {
   background-color: #4b5e40;
   color: #fff;
   min-height: 60px;
@@ -755,29 +820,29 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
 }
 
 @media (min-width:768px) {
-  .emotion-24 .emotion-13 {
+  .emotion-28 .emotion-13 {
     display: -webkit-box;
     display: -webkit-flex;
     display: -ms-flexbox;
     display: flex;
   }
 
-  .emotion-24 .emotion-17 {
+  .emotion-28 .emotion-17 {
     display: none;
   }
 
-  .emotion-24 .e1jf5lit4 {
+  .emotion-28 .e1jf5lit4 {
     display: none;
   }
 }
 
 @media (min-width:1024px) {
-  .emotion-24 .emotion-23 {
+  .emotion-28 .emotion-27 {
     padding: 0 20px;
   }
 
 @media (min-width:1275px) {
-    .emotion-24 .emotion-23 {
+    .emotion-28 .emotion-27 {
       max-width: 1240px;
       width: 100%;
       margin: 0 auto;
@@ -785,7 +850,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
 }
 }
 
-.emotion-22 {
+.emotion-26 {
   -webkit-box-pack: justify;
   -webkit-justify-content: space-between;
   -ms-flex-pack: justify;
@@ -863,7 +928,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   overflow-y: auto;
 }
 
-.emotion-20 {
+.emotion-24 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -875,12 +940,32 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   display: block;
 }
 
+.emotion-20 {
+  display: none;
+}
+
+@media screen and (min-width:768px) {
+  .emotion-20 {
+    display: inline-block;
+  }
+}
+
 .emotion-18 {
+  display: none;
+}
+
+@media screen and (min-width:768px) {
+  .emotion-18 {
+    display: inline-block;
+  }
+}
+
+.emotion-22 {
   color: #fff;
 }
 
 @media screen and (min-width:1240px) {
-  .emotion-26 {
+  .emotion-30 {
     max-width: 1240px;
     width: 100%;
     margin-left: auto;
@@ -888,7 +973,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   }
 }
 
-.emotion-69 {
+.emotion-73 {
   background: #f9f9f9;
   border-top: 1px solid #e3e3e3;
   color: #999999;
@@ -896,7 +981,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   padding: 20px;
 }
 
-.emotion-67 {
+.emotion-71 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -913,7 +998,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
 }
 
 @media (min-width:768px) {
-  .emotion-67 {
+  .emotion-71 {
     min-width: 400px;
     max-width: 800px;
     margin: auto;
@@ -925,12 +1010,12 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
 }
 
 @media (min-width:1024px) {
-  .emotion-67 {
+  .emotion-71 {
     max-width: 1240px;
   }
 }
 
-.emotion-58 {
+.emotion-62 {
   -webkit-align-items: center;
   -webkit-box-align: center;
   -ms-flex-align: center;
@@ -939,7 +1024,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
 }
 
 @media (min-width:768px) {
-  .emotion-58 {
+  .emotion-62 {
     display: -webkit-box;
     display: -webkit-flex;
     display: -ms-flexbox;
@@ -947,21 +1032,21 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   }
 }
 
-.emotion-28 {
+.emotion-32 {
   color: #e25555;
   padding: 0 5px;
 }
 
-.emotion-56 {
+.emotion-60 {
   position: relative;
   height: 18px;
 }
 
-.emotion-56:hover .emotion-55 {
+.emotion-60:hover .emotion-59 {
   visibility: visible;
 }
 
-.emotion-31 {
+.emotion-35 {
   box-sizing: initial;
   display: inline-block;
   cursor: default;
@@ -970,7 +1055,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   padding: 0 10px;
 }
 
-.emotion-54 {
+.emotion-58 {
   position: absolute;
   background: #d3dddd;
   padding: 1px 4px;
@@ -988,7 +1073,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   top: -2px;
 }
 
-.emotion-54:before {
+.emotion-58:before {
   content: '';
   position: absolute;
   top: 29%;
@@ -1001,7 +1086,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   transform: rotate(90deg);
 }
 
-.emotion-34 {
+.emotion-38 {
   box-sizing: initial;
   display: inline-block;
   cursor: default;
@@ -1010,7 +1095,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   padding: 0 5px;
 }
 
-.emotion-65 {
+.emotion-69 {
   -webkit-align-items: center;
   -webkit-box-align: center;
   -ms-flex-align: center;
@@ -1023,7 +1108,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
 }
 
 @media (min-width:768px) {
-  .emotion-65 {
+  .emotion-69 {
     display: -webkit-box;
     display: -webkit-flex;
     display: -ms-flexbox;
@@ -1031,7 +1116,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   }
 }
 
-.emotion-63 {
+.emotion-67 {
   box-sizing: initial;
   display: inline-block;
   cursor: pointer;
@@ -1040,21 +1125,21 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
   padding: 0 5px;
 }
 
-.emotion-60 {
+.emotion-64 {
   width: 100%;
   height: auto;
 }
 
 <div
-  class="MuiBox-root MuiBox-root-2 emotion-71 emotion-72"
+  class="MuiBox-root MuiBox-root-2 emotion-75 emotion-76"
   style="display: none;"
 >
   <header
-    class="MuiPaper-root MuiPaper-elevation4 MuiAppBar-root MuiAppBar-positionStatic emotion-24 emotion-25 MuiAppBar-colorPrimary"
+    class="MuiPaper-root MuiPaper-elevation4 MuiAppBar-root MuiAppBar-positionStatic emotion-28 emotion-29 MuiAppBar-colorPrimary"
     data-testid="header"
   >
     <div
-      class="MuiToolbar-root MuiToolbar-regular emotion-22 emotion-23 MuiToolbar-gutters"
+      class="MuiToolbar-root MuiToolbar-regular emotion-26 emotion-27 MuiToolbar-gutters"
     >
       <div
         class="MuiToolbar-root MuiToolbar-regular emotion-14 emotion-15 MuiToolbar-gutters"
@@ -1123,7 +1208,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
         </div>
       </div>
       <div
-        class="MuiToolbar-root MuiToolbar-regular emotion-20 emotion-21 MuiToolbar-gutters"
+        class="MuiToolbar-root MuiToolbar-regular emotion-24 emotion-25 MuiToolbar-gutters"
         data-testid="header-right"
       >
         <button
@@ -1150,8 +1235,53 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
             class="MuiTouchRipple-root"
           />
         </button>
+        <div
+          class="emotion-20 emotion-21"
+        >
+          <button
+            class="MuiButtonBase-root MuiButton-root MuiButton-text MuiButton-colorInherit"
+            tabindex="0"
+            title="Change language"
+            type="button"
+          >
+            <span
+              class="MuiButton-label ForwardRef(Button)-label-121"
+            >
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root"
+                focusable="false"
+                role="presentation"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zm6.93 6h-2.95c-.32-1.25-.78-2.45-1.38-3.56 1.84.63 3.37 1.91 4.33 3.56zM12 4.04c.83 1.2 1.48 2.53 1.91 3.96h-3.82c.43-1.43 1.08-2.76 1.91-3.96zM4.26 14C4.1 13.36 4 12.69 4 12s.1-1.36.26-2h3.38c-.08.66-.14 1.32-.14 2 0 .68.06 1.34.14 2H4.26zm.82 2h2.95c.32 1.25.78 2.45 1.38 3.56-1.84-.63-3.37-1.9-4.33-3.56zm2.95-8H5.08c.96-1.66 2.49-2.93 4.33-3.56C8.81 5.55 8.35 6.75 8.03 8zM12 19.96c-.83-1.2-1.48-2.53-1.91-3.96h3.82c-.43 1.43-1.08 2.76-1.91 3.96zM14.34 14H9.66c-.09-.66-.16-1.32-.16-2 0-.68.07-1.35.16-2h4.68c.09.65.16 1.32.16 2 0 .68-.07 1.34-.16 2zm.25 5.56c.6-1.11 1.06-2.31 1.38-3.56h2.95c-.96 1.65-2.49 2.93-4.33 3.56zM16.36 14c.08-.66.14-1.32.14-2 0-.68-.06-1.34-.14-2h3.38c.16.64.26 1.31.26 2s-.1 1.36-.26 2h-3.38z"
+                />
+              </svg>
+              <span
+                class="emotion-18 emotion-19"
+              >
+                English
+              </span>
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall"
+                focusable="false"
+                role="presentation"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M16.59 8.59L12 13.17 7.41 8.59 6 10l6 6 6-6z"
+                />
+              </svg>
+            </span>
+            <span
+              class="MuiTouchRipple-root"
+            />
+          </button>
+        </div>
         <a
-          class="emotion-18 emotion-19"
+          class="emotion-22 emotion-23"
           data-testid="header--tooltip-documentation"
           href="https://verdaccio.org/docs/en/installation"
           rel="noopener noreferrer"
@@ -1255,29 +1385,29 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
     </div>
   </header>
   <div
-    class="MuiBox-root MuiBox-root-195 emotion-26 emotion-27"
+    class="MuiBox-root MuiBox-root-196 emotion-30 emotion-31"
   />
   <div
-    class="emotion-69 emotion-70"
+    class="emotion-73 emotion-74"
   >
     <div
-      class="emotion-67 emotion-68"
+      class="emotion-71 emotion-72"
     >
       <div
-        class="emotion-58 emotion-59"
+        class="emotion-62 emotion-63"
       >
         Made with 
         <span
-          class="emotion-28 emotion-29"
+          class="emotion-32 emotion-33"
         >
           ♥
         </span>
          on
         <span
-          class="emotion-56 emotion-57"
+          class="emotion-60 emotion-61"
         >
           <svg
-            class="emotion-30 emotion-31 emotion-32"
+            class="emotion-34 emotion-35 emotion-36"
           >
             <title>
               Earth
@@ -1287,10 +1417,10 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
             />
           </svg>
           <span
-            class="emotion-54 emotion-55"
+            class="emotion-58 emotion-59"
           >
             <svg
-              class="emotion-33 emotion-34 emotion-32"
+              class="emotion-37 emotion-38 emotion-36"
             >
               <title>
                 Spain
@@ -1300,7 +1430,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
               />
             </svg>
             <svg
-              class="emotion-33 emotion-34 emotion-32"
+              class="emotion-37 emotion-38 emotion-36"
             >
               <title>
                 Nicaragua
@@ -1310,7 +1440,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
               />
             </svg>
             <svg
-              class="emotion-33 emotion-34 emotion-32"
+              class="emotion-37 emotion-38 emotion-36"
             >
               <title>
                 India
@@ -1320,7 +1450,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
               />
             </svg>
             <svg
-              class="emotion-33 emotion-34 emotion-32"
+              class="emotion-37 emotion-38 emotion-36"
             >
               <title>
                 Brazil
@@ -1330,7 +1460,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
               />
             </svg>
             <svg
-              class="emotion-33 emotion-34 emotion-32"
+              class="emotion-37 emotion-38 emotion-36"
             >
               <title>
                 China
@@ -1340,7 +1470,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
               />
             </svg>
             <svg
-              class="emotion-33 emotion-34 emotion-32"
+              class="emotion-37 emotion-38 emotion-36"
             >
               <title>
                 Austria
@@ -1350,7 +1480,7 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
               />
             </svg>
             <svg
-              class="emotion-33 emotion-34 emotion-32"
+              class="emotion-37 emotion-38 emotion-36"
             >
               <title>
                 Germany
@@ -1363,16 +1493,16 @@ exports[`<App /> should display the Loading component at the beginning  1`] = `
         </span>
       </div>
       <div
-        class="emotion-65 emotion-66"
+        class="emotion-69 emotion-70"
       >
         Powered by
         <span
-          class="emotion-33 emotion-63 emotion-64"
+          class="emotion-37 emotion-67 emotion-68"
           title="Verdaccio"
         >
           <img
             alt="Verdaccio"
-            class="emotion-60 emotion-61"
+            class="emotion-64 emotion-65"
             src="[object Object]"
           />
         </span>

src/App/load-dayjs-locale.ts

@@ -25,14 +25,13 @@ function loadDayJSLocale() {
   }
 
   switch (locale.toLowerCase()) {
-    // At the moment we only support pt-BR, please see: i18n/translations/*
     case 'pt-br':
       {
         require('dayjs/locale/pt-br');
         dayjs.locale('pt-br');
       }
       break;
-    case 'de':
+    case 'de-de':
       {
         require('dayjs/locale/de');
         dayjs.locale('de');

src/components/Header/HeaderRight.tsx

@@ -3,6 +3,7 @@ import { useTranslation } from 'react-i18next';
 
 import Button from '../../muiComponents/Button';
 import ThemeContext from '../../design-tokens/ThemeContext';
+import LanguageSwitch from '../LanguageSwitch';
 
 import { RightSide } from './styles';
 import HeaderToolTip from './HeaderToolTip';
@@ -72,6 +73,7 @@ const HeaderRight: React.FC<Props> = ({
       {!withoutSearch && (
         <HeaderToolTip onClick={onToggleMobileNav} title={t('search.packages')} tooltipIconType={'search'} />
       )}
+      <LanguageSwitch />
       <HeaderToolTip title={t('header.documentation')} tooltipIconType={'help'} />
       <HeaderToolTip onClick={onOpenRegistryInfoDialog} title={t('header.registry-info')} tooltipIconType={'info'} />
       <HeaderToolTip

src/components/Header/__snapshots__/Header.test.tsx.snap

@@ -1,7 +1,7 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`<Header /> component with logged in state should load the component in logged in state 1`] = `
-.emotion-24 {
+.emotion-28 {
   background-color: #4b5e40;
   color: #fff;
   min-height: 60px;
@@ -16,29 +16,29 @@ exports[`<Header /> component with logged in state should load the component in
 }
 
 @media (min-width:768px) {
-  .emotion-24 .emotion-13 {
+  .emotion-28 .emotion-13 {
     display: -webkit-box;
     display: -webkit-flex;
     display: -ms-flexbox;
     display: flex;
   }
 
-  .emotion-24 .emotion-17 {
+  .emotion-28 .emotion-17 {
     display: none;
   }
 
-  .emotion-24 .e1jf5lit4 {
+  .emotion-28 .e1jf5lit4 {
     display: none;
   }
 }
 
 @media (min-width:1024px) {
-  .emotion-24 .emotion-23 {
+  .emotion-28 .emotion-27 {
     padding: 0 20px;
   }
 
 @media (min-width:1275px) {
-    .emotion-24 .emotion-23 {
+    .emotion-28 .emotion-27 {
       max-width: 1240px;
       width: 100%;
       margin: 0 auto;
@@ -46,7 +46,7 @@ exports[`<Header /> component with logged in state should load the component in
 }
 }
 
-.emotion-22 {
+.emotion-26 {
   -webkit-box-pack: justify;
   -webkit-justify-content: space-between;
   -ms-flex-pack: justify;
@@ -124,7 +124,7 @@ exports[`<Header /> component with logged in state should load the component in
   overflow-y: auto;
 }
 
-.emotion-20 {
+.emotion-24 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -136,16 +136,36 @@ exports[`<Header /> component with logged in state should load the component in
   display: block;
 }
 
+.emotion-20 {
+  display: none;
+}
+
+@media screen and (min-width:768px) {
+  .emotion-20 {
+    display: inline-block;
+  }
+}
+
 .emotion-18 {
+  display: none;
+}
+
+@media screen and (min-width:768px) {
+  .emotion-18 {
+    display: inline-block;
+  }
+}
+
+.emotion-22 {
   color: #fff;
 }
 
 <header
-  class="MuiPaper-root MuiPaper-elevation4 MuiAppBar-root MuiAppBar-positionStatic emotion-24 emotion-25 MuiAppBar-colorPrimary"
+  class="MuiPaper-root MuiPaper-elevation4 MuiAppBar-root MuiAppBar-positionStatic emotion-28 emotion-29 MuiAppBar-colorPrimary"
   data-testid="header"
 >
   <div
-    class="MuiToolbar-root MuiToolbar-regular emotion-22 emotion-23 MuiToolbar-gutters"
+    class="MuiToolbar-root MuiToolbar-regular emotion-26 emotion-27 MuiToolbar-gutters"
   >
     <div
       class="MuiToolbar-root MuiToolbar-regular emotion-14 emotion-15 MuiToolbar-gutters"
@@ -214,7 +234,7 @@ exports[`<Header /> component with logged in state should load the component in
       </div>
     </div>
     <div
-      class="MuiToolbar-root MuiToolbar-regular emotion-20 emotion-21 MuiToolbar-gutters"
+      class="MuiToolbar-root MuiToolbar-regular emotion-24 emotion-25 MuiToolbar-gutters"
       data-testid="header-right"
     >
       <button
@@ -241,8 +261,53 @@ exports[`<Header /> component with logged in state should load the component in
           class="MuiTouchRipple-root"
         />
       </button>
+      <div
+        class="emotion-20 emotion-21"
+      >
+        <button
+          class="MuiButtonBase-root MuiButton-root MuiButton-text MuiButton-colorInherit"
+          tabindex="0"
+          title="Change language"
+          type="button"
+        >
+          <span
+            class="MuiButton-label ForwardRef(Button)-label-322"
+          >
+            <svg
+              aria-hidden="true"
+              class="MuiSvgIcon-root"
+              focusable="false"
+              role="presentation"
+              viewBox="0 0 24 24"
+            >
+              <path
+                d="M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zm6.93 6h-2.95c-.32-1.25-.78-2.45-1.38-3.56 1.84.63 3.37 1.91 4.33 3.56zM12 4.04c.83 1.2 1.48 2.53 1.91 3.96h-3.82c.43-1.43 1.08-2.76 1.91-3.96zM4.26 14C4.1 13.36 4 12.69 4 12s.1-1.36.26-2h3.38c-.08.66-.14 1.32-.14 2 0 .68.06 1.34.14 2H4.26zm.82 2h2.95c.32 1.25.78 2.45 1.38 3.56-1.84-.63-3.37-1.9-4.33-3.56zm2.95-8H5.08c.96-1.66 2.49-2.93 4.33-3.56C8.81 5.55 8.35 6.75 8.03 8zM12 19.96c-.83-1.2-1.48-2.53-1.91-3.96h3.82c-.43 1.43-1.08 2.76-1.91 3.96zM14.34 14H9.66c-.09-.66-.16-1.32-.16-2 0-.68.07-1.35.16-2h4.68c.09.65.16 1.32.16 2 0 .68-.07 1.34-.16 2zm.25 5.56c.6-1.11 1.06-2.31 1.38-3.56h2.95c-.96 1.65-2.49 2.93-4.33 3.56zM16.36 14c.08-.66.14-1.32.14-2 0-.68-.06-1.34-.14-2h3.38c.16.64.26 1.31.26 2s-.1 1.36-.26 2h-3.38z"
+              />
+            </svg>
+            <span
+              class="emotion-18 emotion-19"
+            >
+              English
+            </span>
+            <svg
+              aria-hidden="true"
+              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall"
+              focusable="false"
+              role="presentation"
+              viewBox="0 0 24 24"
+            >
+              <path
+                d="M16.59 8.59L12 13.17 7.41 8.59 6 10l6 6 6-6z"
+              />
+            </svg>
+          </span>
+          <span
+            class="MuiTouchRipple-root"
+          />
+        </button>
+      </div>
       <a
-        class="emotion-18 emotion-19"
+        class="emotion-22 emotion-23"
         data-testid="header--tooltip-documentation"
         href="https://verdaccio.org/docs/en/installation"
         rel="noopener noreferrer"
@@ -359,7 +424,7 @@ exports[`<Header /> component with logged in state should load the component in
 `;
 
 exports[`<Header /> component with logged in state should load the component in logged out state 1`] = `
-.emotion-24 {
+.emotion-28 {
   background-color: #4b5e40;
   color: #fff;
   min-height: 60px;
@@ -374,29 +439,29 @@ exports[`<Header /> component with logged in state should load the component in
 }
 
 @media (min-width:768px) {
-  .emotion-24 .emotion-13 {
+  .emotion-28 .emotion-13 {
     display: -webkit-box;
     display: -webkit-flex;
     display: -ms-flexbox;
     display: flex;
   }
 
-  .emotion-24 .emotion-17 {
+  .emotion-28 .emotion-17 {
     display: none;
   }
 
-  .emotion-24 .e1jf5lit4 {
+  .emotion-28 .e1jf5lit4 {
     display: none;
   }
 }
 
 @media (min-width:1024px) {
-  .emotion-24 .emotion-23 {
+  .emotion-28 .emotion-27 {
     padding: 0 20px;
   }
 
 @media (min-width:1275px) {
-    .emotion-24 .emotion-23 {
+    .emotion-28 .emotion-27 {
       max-width: 1240px;
       width: 100%;
       margin: 0 auto;
@@ -404,7 +469,7 @@ exports[`<Header /> component with logged in state should load the component in
 }
 }
 
-.emotion-22 {
+.emotion-26 {
   -webkit-box-pack: justify;
   -webkit-justify-content: space-between;
   -ms-flex-pack: justify;
@@ -482,7 +547,7 @@ exports[`<Header /> component with logged in state should load the component in
   overflow-y: auto;
 }
 
-.emotion-20 {
+.emotion-24 {
   display: -webkit-box;
   display: -webkit-flex;
   display: -ms-flexbox;
@@ -494,16 +559,36 @@ exports[`<Header /> component with logged in state should load the component in
   display: block;
 }
 
+.emotion-20 {
+  display: none;
+}
+
+@media screen and (min-width:768px) {
+  .emotion-20 {
+    display: inline-block;
+  }
+}
+
 .emotion-18 {
+  display: none;
+}
+
+@media screen and (min-width:768px) {
+  .emotion-18 {
+    display: inline-block;
+  }
+}
+
+.emotion-22 {
   color: #fff;
 }
 
 <header
-  class="MuiPaper-root MuiPaper-elevation4 MuiAppBar-root MuiAppBar-positionStatic emotion-24 emotion-25 MuiAppBar-colorPrimary"
+  class="MuiPaper-root MuiPaper-elevation4 MuiAppBar-root MuiAppBar-positionStatic emotion-28 emotion-29 MuiAppBar-colorPrimary"
   data-testid="header"
 >
   <div
-    class="MuiToolbar-root MuiToolbar-regular emotion-22 emotion-23 MuiToolbar-gutters"
+    class="MuiToolbar-root MuiToolbar-regular emotion-26 emotion-27 MuiToolbar-gutters"
   >
     <div
       class="MuiToolbar-root MuiToolbar-regular emotion-14 emotion-15 MuiToolbar-gutters"
@@ -572,7 +657,7 @@ exports[`<Header /> component with logged in state should load the component in
       </div>
     </div>
     <div
-      class="MuiToolbar-root MuiToolbar-regular emotion-20 emotion-21 MuiToolbar-gutters"
+      class="MuiToolbar-root MuiToolbar-regular emotion-24 emotion-25 MuiToolbar-gutters"
       data-testid="header-right"
     >
       <button
@@ -599,8 +684,53 @@ exports[`<Header /> component with logged in state should load the component in
           class="MuiTouchRipple-root"
         />
       </button>
+      <div
+        class="emotion-20 emotion-21"
+      >
+        <button
+          class="MuiButtonBase-root MuiButton-root MuiButton-text MuiButton-colorInherit"
+          tabindex="0"
+          title="Change language"
+          type="button"
+        >
+          <span
+            class="MuiButton-label ForwardRef(Button)-label-119"
+          >
+            <svg
+              aria-hidden="true"
+              class="MuiSvgIcon-root"
+              focusable="false"
+              role="presentation"
+              viewBox="0 0 24 24"
+            >
+              <path
+                d="M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zm6.93 6h-2.95c-.32-1.25-.78-2.45-1.38-3.56 1.84.63 3.37 1.91 4.33 3.56zM12 4.04c.83 1.2 1.48 2.53 1.91 3.96h-3.82c.43-1.43 1.08-2.76 1.91-3.96zM4.26 14C4.1 13.36 4 12.69 4 12s.1-1.36.26-2h3.38c-.08.66-.14 1.32-.14 2 0 .68.06 1.34.14 2H4.26zm.82 2h2.95c.32 1.25.78 2.45 1.38 3.56-1.84-.63-3.37-1.9-4.33-3.56zm2.95-8H5.08c.96-1.66 2.49-2.93 4.33-3.56C8.81 5.55 8.35 6.75 8.03 8zM12 19.96c-.83-1.2-1.48-2.53-1.91-3.96h3.82c-.43 1.43-1.08 2.76-1.91 3.96zM14.34 14H9.66c-.09-.66-.16-1.32-.16-2 0-.68.07-1.35.16-2h4.68c.09.65.16 1.32.16 2 0 .68-.07 1.34-.16 2zm.25 5.56c.6-1.11 1.06-2.31 1.38-3.56h2.95c-.96 1.65-2.49 2.93-4.33 3.56zM16.36 14c.08-.66.14-1.32.14-2 0-.68-.06-1.34-.14-2h3.38c.16.64.26 1.31.26 2s-.1 1.36-.26 2h-3.38z"
+              />
+            </svg>
+            <span
+              class="emotion-18 emotion-19"
+            >
+              English
+            </span>
+            <svg
+              aria-hidden="true"
+              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall"
+              focusable="false"
+              role="presentation"
+              viewBox="0 0 24 24"
+            >
+              <path
+                d="M16.59 8.59L12 13.17 7.41 8.59 6 10l6 6 6-6z"
+              />
+            </svg>
+          </span>
+          <span
+            class="MuiTouchRipple-root"
+          />
+        </button>
+      </div>
       <a
-        class="emotion-18 emotion-19"
+        class="emotion-22 emotion-23"
         data-testid="header--tooltip-documentation"
         href="https://verdaccio.org/docs/en/installation"
         rel="noopener noreferrer"

src/components/Icon/Icon.tsx

@@ -11,6 +11,8 @@ import nicaragua from './img/nicaragua.svg';
 import pakistan from './img/pakistan.svg';
 import austria from './img/austria.svg';
 import spain from './img/spain.svg';
+import usa from './img/usa.svg';
+import france from './img/france.svg';
 import earth from './img/earth.svg';
 import verdaccio from './img/verdaccio.svg';
 import filebinary from './img/filebinary.svg';
@@ -23,9 +25,11 @@ export interface IconsMap {
   brazil: string;
   spain: string;
   china: string;
+  usa: string;
   nicaragua: string;
   pakistan: string;
   austria: string;
+  france: string;
   germany: string;
   india: string;
   earth: string;
@@ -54,6 +58,8 @@ export const Icons: IconsMap = {
   time,
   version,
   germany,
+  usa,
+  france,
 };
 
 export interface Props {

src/components/Icon/img/france.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" id="france"><path d="M38.345 88.273C17.167 88.273 0 105.44 0 126.618v258.759c0 21.177 17.167 38.345 38.345 38.345h132.322V88.273H38.345z" fill="#41479b"/><path fill="#f5f5f5" d="M170.67 88.277h170.67v335.45H170.67z"/><path d="M473.655 88.273H341.333v335.448h132.322c21.177 0 38.345-17.167 38.345-38.345V126.618c0-21.178-17.167-38.345-38.345-38.345z" fill="#ff4b55"/></svg>

src/components/LanguageSwitch/LanguageSwitch.tsx

@@ -0,0 +1,204 @@
+import React, { MouseEvent, useCallback, useState, useRef, useContext } from 'react';
+import LanguageIcon from '@material-ui/icons/Language';
+import ExpandMoreIcon from '@material-ui/icons/ExpandMore';
+import i18next, { TFunction } from 'i18next';
+import { useTranslation } from 'react-i18next';
+import { withStyles } from '@material-ui/core/styles';
+import ClickAwayListener from '@material-ui/core/ClickAwayListener';
+import Grow from '@material-ui/core/Grow';
+import Popper from '@material-ui/core/Popper';
+import MenuList from '@material-ui/core/MenuList';
+import styled from '@emotion/styled';
+import { css } from '@emotion/core';
+
+import { Language } from '../../../i18n/config';
+import ThemeContext from '../../design-tokens/ThemeContext';
+import Paper from '../../muiComponents/Paper';
+import MenuItem from '../../muiComponents/MenuItem';
+import Button from '../../muiComponents/Button';
+import Tooltip from '../../muiComponents/Tooltip';
+import Divider from '../../muiComponents/Divider';
+import Box from '../../muiComponents/Box';
+import { Theme } from '../../design-tokens/theme';
+import Link from '../Link';
+import Icon from '../Icon';
+
+const VERDACCIO_UI_GITHUB_REPOSITORY = 'https://github.com/verdaccio/ui';
+
+const getTranslatedCurrentLanguage = (
+  t: TFunction
+): { [key: string]: { translation: string; icon: React.ComponentProps<typeof Icon>['name'] } } => ({
+  'en-us': {
+    translation: t('lng.english'),
+    icon: 'usa',
+  },
+  'fr-fr': {
+    translation: t('lng.french'),
+    icon: 'france',
+  },
+  'pt-br': {
+    translation: t('lng.portuguese'),
+    icon: 'brazil',
+  },
+  'de-de': {
+    translation: t('lng.german'),
+    icon: 'germany',
+  },
+  'es-es': {
+    translation: t('lng.spanish'),
+    icon: 'spain',
+  },
+  'zh-cn': {
+    translation: t('lng.chinese'),
+    icon: 'china',
+  },
+});
+
+const LanguageSwitch = () => {
+  const themeContext = useContext(ThemeContext);
+  const { t } = useTranslation();
+  const [open, setOpen] = useState(false);
+  const anchorRef = useRef<HTMLButtonElement>(null);
+
+  if (!themeContext) {
+    throw Error(t('theme-context-not-correct-used'));
+  }
+
+  const languages = (i18next.options.resources ? Object.keys(i18next.options.resources) : []) as Array<Language>;
+  const currentLanguage: Language = i18next.language || i18next.options?.fallbackLng?.[0];
+
+  const { translation: userLanguage } = getTranslatedCurrentLanguage(t)[currentLanguage.toLowerCase()];
+
+  const handleToggle = useCallback(() => {
+    setOpen(prevOpen => !prevOpen);
+  }, []);
+
+  const handleClose = useCallback(
+    (event: MouseEvent<HTMLLIElement | Document | HTMLAnchorElement>) => {
+      if (anchorRef.current) {
+        if (anchorRef.current.contains(event.currentTarget)) {
+          return;
+        }
+      }
+
+      setOpen(false);
+    },
+    [setOpen]
+  );
+
+  const handleSwitchLanguage = useCallback(
+    (language: Language) => (event: MouseEvent<HTMLLIElement>) => {
+      themeContext.setLanguage(language);
+      handleClose(event);
+    },
+    [handleClose, themeContext]
+  );
+
+  // return focus to the button when we transitioned from !open -> open
+  const prevOpen = React.useRef(open);
+  React.useEffect(() => {
+    if (prevOpen.current === true && open === false) {
+      if (anchorRef.current) {
+        anchorRef.current.focus();
+      }
+    }
+
+    prevOpen.current = open;
+  }, [open]);
+
+  return (
+    <Wrapper>
+      <Tooltip enterDelay={300} title={t('change-language')}>
+        <SwitchButton color="inherit" onClick={handleToggle} ref={anchorRef}>
+          <LanguageIcon />
+          <UserLanguage>{userLanguage}</UserLanguage>
+          <ExpandMoreIcon fontSize="small" />
+        </SwitchButton>
+      </Tooltip>
+      <Popper anchorEl={anchorRef.current} disablePortal={true} open={open} role={undefined} transition={true}>
+        {({ TransitionProps }) => (
+          <Grow {...TransitionProps}>
+            <StyledPaper>
+              <ClickAwayListener onClickAway={handleClose}>
+                <MenuList>
+                  {languages
+                    .filter(language => language !== currentLanguage)
+                    .map(language => {
+                      const { icon, translation } = getTranslatedCurrentLanguage(t)[language.toLowerCase()];
+                      return (
+                        <StyledMenuItem
+                          key={language}
+                          onClick={handleSwitchLanguage(language)}
+                          selected={userLanguage === translation}>
+                          <Icon name={icon} size="md" />
+                          {translation}
+                        </StyledMenuItem>
+                      );
+                    })}
+                  <Box my={1}>
+                    <Divider />
+                  </Box>
+                  <MenuItem button={true}>
+                    <StyledLink external={true} onClick={handleClose} to={VERDACCIO_UI_GITHUB_REPOSITORY}>
+                      {`${t('help-to-translate')}`}
+                    </StyledLink>
+                  </MenuItem>
+                </MenuList>
+              </ClickAwayListener>
+            </StyledPaper>
+          </Grow>
+        )}
+      </Popper>
+    </Wrapper>
+  );
+};
+
+export default LanguageSwitch;
+
+const Wrapper = styled('div')<{ theme?: Theme }>(({ theme }) => ({
+  display: 'none',
+  [`@media screen and (min-width: ${theme && theme.breakPoints.medium}px)`]: {
+    display: 'inline-block',
+  },
+}));
+
+const UserLanguage = styled('span')<{ theme?: Theme }>(({ theme }) => ({
+  display: 'none',
+  [`@media screen and (min-width: ${theme && theme.breakPoints.medium}px)`]: {
+    display: 'inline-block',
+  },
+}));
+
+const SwitchButton = withStyles((theme: Theme) => ({
+  label: {
+    display: 'grid',
+    gridGap: theme?.spacing(1),
+    gridTemplateColumns: '24px 20px',
+    [`@media screen and (min-width: ${theme && theme.breakPoints.medium}px)`]: {
+      gridTemplateColumns: '24px 1fr 20px',
+    },
+  },
+}))(Button);
+
+const StyledMenuItem = withStyles((theme: Theme) => ({
+  root: {
+    display: 'grid',
+    cursor: 'pointer',
+    gridGap: theme?.spacing(0.5),
+    gridTemplateColumns: '20px 1fr',
+    alignItems: 'center',
+    '&:first-child': {
+      borderTopLeftRadius: 4,
+      borderTopRightRadius: 4,
+    },
+  },
+}))(MenuItem);
+
+const StyledLink = styled(Link)<{ theme?: Theme }>(({ theme }) => ({
+  color: theme?.palette.type === 'dark' ? theme?.palette.white : theme?.palette.text.primary,
+  textDecoration: 'none',
+}));
+
+const StyledPaper = styled(Paper)<{ theme?: Theme }>(({ theme }) => ({
+  backgroundColor: theme?.palette.type === 'dark' ? theme?.palette.cyanBlue : theme?.palette.white,
+}));

src/components/LanguageSwitch/index.ts

@@ -0,0 +1 @@
+export { default } from './LanguageSwitch';

src/design-tokens/ThemeContext.ts

@@ -1,8 +1,11 @@
 import { createContext } from 'react';
 
+import { Language } from '../../i18n/config';
 interface Props {
   isDarkMode: boolean;
   setIsDarkMode: (isDarkMode: boolean) => void;
+  language: Language;
+  setLanguage: (language: Language) => void;
 }
 
 const ThemeContext = createContext<undefined | Props>(undefined);

src/design-tokens/ThemeProvider.tsx

@@ -1,6 +1,9 @@
-import React from 'react';
+import React, { useEffect } from 'react';
 import { ThemeProvider as MuiThemeProvider } from '@material-ui/core/styles';
 import { ThemeProvider as EmotionThemeProvider } from 'emotion-theming';
+import i18next from 'i18next';
+
+import { Language } from '../../i18n/config';
 
 import ThemeContext from './ThemeContext';
 import { getTheme, ThemeMode } from './theme';
@@ -8,12 +11,23 @@ import useLocalStorage from './useLocalStorage';
 
 const ThemeProvider: React.FC = ({ children }) => {
   const isDarkModeDefault = window?.__VERDACCIO_BASENAME_UI_OPTIONS?.darkMode;
+  const currentLanguage: Language = i18next.language || i18next.options?.fallbackLng?.[0];
+
   const [isDarkMode, setIsDarkMode] = useLocalStorage('darkMode', !!isDarkModeDefault);
+  const [language, setLanguage] = useLocalStorage('language', currentLanguage);
 
   const themeMode: ThemeMode = isDarkMode ? 'dark' : 'light';
 
+  const changeLanguage = async () => {
+    await i18next.changeLanguage(language);
+  };
+
+  useEffect(() => {
+    changeLanguage();
+  }, [language, changeLanguage]);
+
   return (
-    <ThemeContext.Provider value={{ isDarkMode, setIsDarkMode }}>
+    <ThemeContext.Provider value={{ isDarkMode, setIsDarkMode, language, setLanguage }}>
       <EmotionThemeProvider theme={getTheme(themeMode)}>
         <MuiThemeProvider theme={getTheme(themeMode)}>{children}</MuiThemeProvider>
       </EmotionThemeProvider>

src/muiComponents/MenuItem/MenuItem.tsx

@@ -9,10 +9,10 @@ interface Props extends Omit<MenuItemProps, 'component'> {
   component?: HTMLElementTagName;
 }
 
-const MenuItem = forwardRef<MenuItemRef, Props>(function MenuItem({ button, ...props }, ref) {
+const MenuItem = forwardRef<MenuItemRef, Props>(function MenuItem(props, ref) {
   // it seems typescript has some discrimination type limitions. Please see: https://github.com/mui-org/material-ui/issues/14971
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  // @ts-ignore Type Types of property 'button' are incompatible.
-  return <StyledMaterialUIMenuItem {...props} button={button as any} innerRef={ref} />;
+  return <StyledMaterialUIMenuItem {...props} ref={ref as any} />;
 });
 
 MenuItem.defaultProps = {
@@ -20,7 +20,6 @@ MenuItem.defaultProps = {
 };
 
 export default MenuItem;
-
 const StyledMaterialUIMenuItem = styled(MaterialUIMenuItem)({
   outline: 'none',
 });

src/utils/package.ts

@@ -1,6 +1,6 @@
 import { isObject } from 'util';
 
-import i18n from 'i18next';
+import i18next from 'i18next';
 import { UpLinks } from '@verdaccio/types';
 import isString from 'lodash/isString';
 import dayjs from 'dayjs';
@@ -93,5 +93,5 @@ export function getRecentReleases(time: Time = {}): Time[] {
 }
 
 export function getAuthorName(authorName: string): string {
-  return authorName.toLowerCase() === 'anonymous' ? i18n.t('author-anonymous') : authorName;
+  return authorName.toLowerCase() === 'anonymous' ? i18next.t('author-anonymous') : authorName;
 }