This is a simple code for a Telegram bot to add Inline Keyboard Markup to all the messages specified.

thexyprob.dart

import 'dart:io';
import 'package:televerse/televerse.dart';

final api = RawAPI(Platform.environment['BOT_TOKEN']!);
void main(List<String> args) async {
  const id = ChannelID("@thexyprob");
  final keys = langMsg.keys.toList();
  final keyboard = buildKeyboard();
  for (final el in keys) {
    final msgId = int.parse(langMsg[el]!.split("/").last);
    await api.editMessageReplyMarkup(id, msgId, replyMarkup: keyboard);
  }
}

const langMsg = {
  "English 🇬🇧": "https://t.me/thexyprob/4",
  "Chineese 🇨🇳": "https://t.me/thexyprob/21",
  "Spanish 🇪🇸": "https://t.me/thexyprob/23",
  "Arabic 🇦🇪": "https://t.me/thexyprob/25",
  "French 🇫🇷": "https://t.me/thexyprob/27",
  "Hindi 🇮🇳": "https://t.me/thexyprob/29",
};

InlineKeyboard buildKeyboard() {
  final k = InlineKeyboard();
  final keys = langMsg.keys.toList();
  for (final el in keys) {
    final pos = keys.indexOf(el);
    k.addUrl(el, langMsg[el]!);
    if (pos == 3) {
      k.row();
    }
  }

  k
      .row()
      .addUrl(
        "Source 1",
        "https://xyproblem.info/",
      )
      .addUrl(
        "Source 2",
        "https://mywiki.wooledge.org/XyProblem",
      )
      .addUrl(
        "Source 3",
        "https://meta.stackexchange.com/questions/66377/what-is-the-xy-problem",
      );

  return k;
}