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pyTelegramBotAPI/examples/middleware/i18n.py

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#!/usr/bin/python
# This example shows how to implement i18n (internationalization) l10n (localization) to create
# multi-language bots with middleware handler.
#
# Note: For the sake of simplicity of this example no extra library is used. However, it is recommended to use
# better i18n systems (gettext and etc) for handling multilingual translations.
# This is not a working, production-ready sample and it is highly recommended not to use it in production.
#
# In this example let's imagine we want to introduce localization or internationalization into our project and
# we need some global function to activate the language once and to use that language in all other message
# handler functions for not repeatedly activating it.
# The middleware (i18n and l10n) is explained:
import telebot
from telebot import apihelper
apihelper.ENABLE_MIDDLEWARE = True
TRANSLATIONS = {
'hello': {
'en': 'hello',
'ru': 'привет',
'uz': 'salom'
}
}
_lang = 'en'
def activate(lang):
global _lang
_lang = lang
def _(string):
return TRANSLATIONS[string][_lang]
bot = telebot.TeleBot('TOKEN')
@bot.middleware_handler(update_types=['message'])
def activate_language(bot_instance, message):
activate(message.from_user.language_code)
@bot.message_handler(commands=['start'])
def start(message):
bot.send_message(message.chat.id, _('hello'))
bot.polling()