YOU SAID:

That's suspect if I do say so myself

INTO JAPANESE

私がそう言うならそれは疑わしい

BACK INTO ENGLISH

If I say so it's suspicious

INTO JAPANESE

そう言えば怪しい

BACK INTO ENGLISH

Speaking of which, it's suspicious

INTO JAPANESE

そういえば怪しい

BACK INTO ENGLISH

Speaking of which is suspicious

INTO JAPANESE

怪しいといえば

BACK INTO ENGLISH

Speaking of suspicious

INTO JAPANESE

怪しいといえば

BACK INTO ENGLISH

Speaking of suspicious