Poweranimals
Lurker
And we don't really need to worry about it.
Seriously, it's not as difficult as you're making it out to be. Like I said, it wouldn't be hard to just have someone explain the kanji. Kids won't care, they really won't. Not the majority anyway. You're letting the Japanese aspect blind you from what could be done.
Just say that it's an ancient and/or alien language. Problem solved.
