My recollection of the books is a bit rusty, but I think he also spoke Welsh (his brother-in-law's family was Welsh) and maybe Dutch as well? The Netherlands were the main market for English wool, and were the nursery of early English Protestantism (like Cromwell himself).

In the books that is correct. In actual history, I do not know.

It is regrettable that Mantel did not survive to see this artifact.

And the TV show.

I haven't seen those, not sure how well they could capture the books.

Wolf Hall is about the best TV I've seen ... https://en.m.wikipedia.org/wiki/Wolf_Hall_(TV_series)

"I, Claudius" and "Breaking Bad" and "Better Call Saul" are in the same league.

They are surprisingly excellent (and I say that as someone who loves the books and usually hates adaptations) not least because the cast (in particular Mark Rylance) are fantastic.

As an aside, for anyone who gets the chance to see Mark Rylance in theatre in particular I would say take it if you possibly can. I’ve seen him a few times and he has been absolutely staggeringly good every time.