code

# https://telegram.org/

# https://pypi.org/project/translate/

# doc: https://translate-python.readthedocs.io/en/latest/?badge=latest

# TELEGRAM

# methods: https://core.telegram.org/methods

# class Message: https://core.telegram.org/bots/api#message

# https://www.heroku.com/

# BUILDPACK: https://elements.heroku.com/buildpacks/heroku/heroku-buildpack-python

from translate import Translator

lang = ''

possible = False

def select_translator():

  global lang, possible

  lang = input('Выберите переводчик:\n[0] - русско-агнглийский\n[1] - русско-немецкий\n[2] - англо-русский\n[3] - англо-немецкий\n[4] - немецко-русский\n[5] - немецко-английский\n')

  # проверка

  if lang in '012345':

    for i in '012345':

      #print(i)

      if lang==i: possible= True

  else:

    print('Такого языка нет.')

    select_translator()

def translate_message(mess):

  #print(lang, possible)

  if possible is True and lang=='0':

    tran= Translator(to_lang="en", from_lang="ru") # ru_to_en

  elif possible is True and lang=='1':

    tran= Translator(to_lang="de", from_lang="ru") # ru_to_deu

  elif possible is True and lang=='2':

    tran= Translator(to_lang="ru", from_lang="en") # en_to_rus

  elif possible is True and lang=='3':

    tran= Translator(to_lang="de", from_lang="en") # en_to_deu

  elif possible is True and lang=='4':

    tran= Translator(to_lang="ru", from_lang="de") # deu_to_ru

  elif possible is True and lang=='5':

    tran= Translator(to_lang="en", from_lang="de") # deu_to_en

  ans = tran.translate(mess)

  return ans

select_translator()

mess = input('Введите текст для перевода:\n')

translate_text = translate_message(mess)

print('Перевод:',translate_text)