Internationalization support (#477)

* add i18next lib
add some translations

* add translations

* fix font-family

* fix pin versions

src/i18n.ts

@@ -0,0 +1,21 @@
+import i18n from "i18next";
+import { initReactI18next } from "react-i18next";
+
+import Backend from "i18next-xhr-backend";
+import LanguageDetector from "i18next-browser-languagedetector";
+
+i18n
+  .use(Backend)
+  .use(LanguageDetector)
+  .use(initReactI18next)
+  .init({
+    backend: {
+      loadPath: "./locales/{{lng}}/translation.json"
+    },
+    lng: "en",
+    fallbackLng: "en",
+    debug: false,
+    react: { useSuspense: false }
+  });
+
+export default i18n;