It is... The biggest obstacle here is that while the amulets seem to translate the spoken word well enough, the same can't be said for the written. So it's difficult to find a language that everyone can understand.

I'm still writing things down in Caelondian and Ura of course. Seimei understands it, and there are Caels and Ura who live here who could translate for someone if they were asked, myself included.