YOU SAID:
We have to go Back to the Future!
INTO JAPANESE
バック・トゥ・ザ・フューチャーに行かなきゃ!
BACK INTO ENGLISH
I have to go back to the future!
INTO JAPANESE
未来に帰らなきゃ!
BACK INTO ENGLISH
I have to go back to the future!
That didn't even make that much sense in English.