YOU SAID:
I’ll be hanging out in the treehouse tonight!
INTO JAPANESE
今夜はツリーハウスで過ごすよ!
BACK INTO ENGLISH
I'm going to spend the night in the treehouse!
INTO JAPANESE
ツリーハウスで一夜を過ごすつもりだ!
BACK INTO ENGLISH
I'm going to spend the night in the treehouse!
That didn't even make that much sense in English.