from googletrans import Translator

word_list = []


class Translate:

    def __init__(self, word, target_language='en'):
        translator = Translator()

        self.target_language = target_language
        self.original_language = translator.detect(word).lang
        self.chained_translation = self.repeat_translation(word, target_language)

    def __getitem__(self, item):
        return self.chained_translation[item]

    def __len__(self):
        return len(self.chained_translation)

    def repeat_translation(self, word, target, count=0):
        translator = Translator()
        translated_text = translator.translate(word, dest=target).text
        word_list.append(translated_text)
        count += 1
        # When recursive count is odd.
        if count % 2 == 1:
            return self.repeat_translation(translated_text, self.original_language, count)
        # When recursive count is even and under 10.
        if count < 10:
            return self.repeat_translation(translated_text, self.target_language, count)
        # When recursive ends.
        else:
            return word_list

test = Translate('は忙しい。彼は多忙な人間だ。勉強をしたい')
print(test.chained_translation)
print(test[9])
print(test[8])
print(len(test))

['I am busy. He is a busy man. I want to learn', '私は忙しいです。彼は忙しい人だ。学びたい', 'I am busy. He is a busy man. I want to learn', '私は忙しいです。彼は忙しい人だ。学びたい', 'I am busy. He is a busy man. I want to learn', '私は忙しいです。彼は忙しい人だ。学びたい', 'I am busy. He is a busy man. I want to learn', '私は忙しいです。彼は忙しい人だ。学びたい', 'I am busy. He is a busy man. I want to learn', '私は忙しいです。彼は忙しい人だ。学びたい']
私は忙しいです。彼は忙しい人だ。学びたい
I am busy. He is a busy man. I want to learn
10

from googletrans import Translator

def chained_translations(phrase, target_language='en', source_language=None):
    translator = Translator()
    source_language = source_language or translator.detect(phrase).lang
    while True:
        phrase = translator.translate(phrase, src=source_language, dest=target_language).text
        yield phrase
        source_language, target_language = target_language, source_language

>>> test = chained_translations('は忙しい。彼は多忙な人間だ。勉強をしたい')
>>> print(next(test))
'I am busy. He is a busy man. I want to learn'
>>> print(next(test))
'私は忙しいです。彼は忙しい人だ。学びたい'
>>> from itertools import islice
>>> print(list(islice(test, 3)))
['I am busy. He is a busy man. I want to learn', '私は忙しいです。彼は忙しい人だ。学びたい', 'I am busy. He is a busy man. I want to learn']