ref: replace "ctx.from.language_code" with a function to get the language code and fix ts implementation for "reply_to_message_id" (#51)

Co-authored-by: Lucas Gabriel <lucmsilva651@gmail.com>

src/plugins/checklang.ts

@@ -7,7 +7,10 @@ const languageFiles = {
   'en-gb': '../locales/english.json'
 };
 
-function getStrings(languageCode: string) {
+function getStrings(languageCode?: string) {
+  if (!languageCode) {
+    return require(languageFiles['en']);
+  }
   const filePath: string = languageFiles[languageCode] || languageFiles['en'];
   try {
     return require(filePath);