add RU locale

web/src/index.jsx

@@ -1,12 +1,42 @@
 import { StrictMode } from 'react'
 import ReactDOM from 'react-dom'
+import { I18nextProvider } from 'react-i18next'
+import i18n from 'i18next'
+import LanguageDetector from 'i18next-browser-languagedetector'
+import XHR from 'i18next-xhr-backend'
 
 import './index.css'
 import App from './App'
+import translationEng from './locales/en/translation.json'
+import translationRus from './locales/ru/translation.json'
+
+i18n
+  .use(XHR)
+  .use(LanguageDetector)
+  .init({
+    lng: 'ru', // default
+    fallbackLng: 'en', // use en if detected lng is not available
+    keySeparator: false, // we do not use keys in form messages.welcome
+    interpolation: {
+      escapeValue: false, // react already safes from xss
+    },
+    resources: {
+      en: {
+        translations: translationEng,
+      },
+      ru: {
+        translations: translationRus,
+      },
+    },
+    ns: ['translations'],
+    defaultNS: 'translations',
+  })
 
 ReactDOM.render(
   <StrictMode>
-    <App />
+    <I18nextProvider i18n={i18n}>
+      <App />
+    </I18nextProvider>
   </StrictMode>,
   document.getElementById('root'),
 )