YOU SAID:
What are you up to foul, dirty birds?
INTO JAPANESE
あなたは汚い、汚れた鳥に何をしているのですか?
BACK INTO ENGLISH
What are you doing to a dirty, dirty bird?
INTO JAPANESE
あなたは汚れた、汚れた鳥に何をしていますか?
BACK INTO ENGLISH
What are you doing to a dirty, dirty bird?
That didn't even make that much sense in English.