I'm still quibbling. :-) It was a Catholic court, in Belgium. But you're right, he was convicted of teaching Lutheranism, not of translating the Bible into English.
Well, hmm (furrowed brow) right: I thought he'd been convicted by an Anglican court first (Cuthbert Tunstall?), and then by a Catholic court in what is now Belgium. (Take off 5 points for that.)
You're entirely correct that Tyndale supported in effect the Catholic position against Henry VIII's divorce; that incurred the king's wrath and set in motion the "politics" of his betrayal and eventual execution.
The cruelty of that period is hair-raising. I recently read Ackroyd's bio of Thomas More: I have to think he repented his part in the blood-spilling, before his own was spilt.