This question already has an answer here:
Since Dumbledore can understand parseltongue without being a parselmouth, and Ron can mimic enough parseltongue to open the Chamber door without being a parselmouth, it seems logical that someone like Dumbledore who has deliberately studies parseltongue enough to be able to understand conversations between parselmouths, should be able to mimic the sounds enough to be able to speak it, at least better than someone like Ron
However, through out the books there is no indication that Dumbledore could do any more than understand parseltongue spoken in the pensieve memory. Going through questions about parseltongue through this site gives me a similar impression. Is there any indication of whether Dumbledore could speak parseltongue or not? Is there anything preventing someone from learning to speak parseltongue? Could Dumbledore have a conversation with Harry or a snake entirely in parseltongue?
An answer at any level of canon is welcome