@dp.message_handler(lambda m: m.from_user.id in admins, content_types=['document'])
async def change_localization(m):
    name = m.document.file_name
    if name == 'ru_RU.po':
        f = await bot.get_file(m.document.file_id)
        print(f)
        print(f'https://api.telegram.org/file/bot{API_TOKEN}{f.file_path}')
        r = requests.get(f'https://api.telegram.org/file/bot{API_TOKEN}/{f.file_path}')
        print(r)
        print(r.content)
        with open('./locale/ru/LC_MESSAGES/ru_RU.po', 'wb') as file:
            file.write(r.content)
        print('Ready')
        print(os.path.abspath("./locale/ru/LC_MESSAGES/ru_RU.po"))
        Popen(["python", "C:\\Users\\Admin\\AppData\\Local\\Programs\\Python\\Python37-32\\Tools\\i18n\\msgfmt.py", "./locale/ru/LC_MESSAGES/ru_RU.po"],
              stdout=sys.stdout).communicate()
        gettext.install('ru_RU', './locale')
        print('Good to go')

        #еще пробовал так:
        gettext_windows.setup_env()
        locale.setlocale(locale.LC_ALL, '')
        gettext.install('ru_RU', './locale')

        #и так:
        t = gettext.translation('ru_Ru', './locale')
        global _
        _ = t.gettext

        #и еще так:
        os.execle(sys.executable, sys.executable, *sys.argv)