Nope, the forums are not in English. The new forum's app/favicon is a yellow smiley face.

I thought Tapatalk is more like a generic mobile client addon to forum wares than being a forum itself. I remember that nagging banner when I was on XDA years ago...

That was the one that I thought of too. I didn't understand why every Invision forum would pop that up as the client to use. Seemed like they were giving away the keys to the castle for free. Crazy.