YOU SAID:
Why don't they stop coming?
INTO JAPANESE
なぜ彼らは来て停止しませんか?
BACK INTO ENGLISH
Why you do not stop they come?
INTO JAPANESE
なぜあなたは彼らが来る停止しませんか?
BACK INTO ENGLISH
Why do not you stop they come?
INTO JAPANESE
なぜあなたは彼らが来る停止しませんか?
BACK INTO ENGLISH
Why do not you stop they come?
That didn't even make that much sense in English.