Add internationalization

.linguirc

@@ -0,0 +1,15 @@
+{
+    "catalogs": [
+        {
+            "path": "<rootDir>/locales/{locale}/messages",
+            "include": "<rootDir>",
+            "exclude": [
+                "**/node_modules/**"
+            ]
+        }
+    ],
+    "format": "lingui",
+    "locales": ["en", "ro", "uk", "ru"],
+    "rootDir": "src",
+    "sourceLocale": "en"
+}

README.md

@@ -91,6 +91,46 @@ Your app is ready to be deployed!
 
 See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
 
+### Using lingui
+
+1. Wrapping texts using `<Trans>` component.
+
+```js
+import { Trans } from "@lingui/macro";
+
+<Trans>Hello world</Trans>;
+```
+
+2. Extracting messages
+
+`npm run extract`
+
+3. Add translations to `messages.json` for each language from the `locales` folder.
+
+```json
+// en/messages.json
+{
+  "Știri oficiale": {
+    "translation": "Official news"
+    // ...
+  }
+}
+
+// ro/messages.json
+{
+  "Știri oficiale": {
+    "translation": "Știri oficiale"
+    // ...
+  }
+}
+```
+
+4. Compiling messages
+
+`npm run compile`
+
+See more details on the official lingui [page](https://lingui.js.org/tutorials/react.html)
+
 ## Learn More
 
 You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).