[derefr]

Well, on the linked page, it mentions "strong transcription performance in 13 languages, including [...] Hindi" but with no mention of Bengali. It probably doesn't know a lick of Bengali, and is just trying to snap your words into the closest language it does know.

[keeganpoppen]

it must have some exposure to bengali— just not enough for them to advertise it. otherwise it would have a damn hard time.