YOU SAID:

you look like someone i know but i don't know who

INTO JAPANESE

私が知っている誰かのように見えるが、誰か知らない

BACK INTO ENGLISH

Looks like someone I know, but don't know anyone?

INTO JAPANESE

誰かのように見える私は、知っているが、誰も知らない?

BACK INTO ENGLISH

Looks like someone I know, but who knows?

INTO JAPANESE

私が知っている誰かのように見える、しかし、誰が知っていますか?

BACK INTO ENGLISH

Looks like someone I know, but who knows?