You can register in English and switch afterwards. The main site won't redirect you to Nutaku for English, only the games section will.
Hmm, I'll have to look for the option for that then, I didn't see one at the time.
Personal favorites, by game:
Millennium War Aigis (RIP): Liana
Girls Kingdom (RIP): Iris
Dragon Tactics: Memories (RIP): Diske
Brave Girl Ravens xR (RIP): Francette
...Most of the games I play on Nutaku end up getting taken down. Hmm.