feat: add Estonian language (#1931)

Co-authored-by: Manuel <30572287+manuel-rw@users.noreply.github.com>

next-i18next.config.js

@@ -33,6 +33,7 @@ module.exports = {
       'tw',
       'uk',
       'vi',
+      'et',
       'lt',
     ],
 

src/tools/language.ts

@@ -238,6 +238,14 @@ export const languages = [
     locale: 'vi',
     dayJsLocale: 'vi'
   },
+  {
+    shortName: 'et',
+    originalName: 'Eesti',
+    translatedName: 'Estonian',
+    country: 'EE',
+    locale: 'et',
+    dayJsLocale: 'et'
+  },
   // Lithuanian
   {
     shortName: 'lt',