The preview site includes experimental Japanese language support.
As part of the MT Forge and Sunrise projects, you can find some of the research results here.
In particular, there is language-agnostic documentation for some of the binary formats, including
.lmd
Lumen UI Files. Also see my AVM1 Decompiler (other flash compilers don't work due to LMD being a modified format).nub
NU Sound Banks.nut
NU Texture Files as well as their .tex
wrappers.nud
NU Model Files as well as their .mdl
wrappersAlso check out my fork-fork of SmashForge that is tuned to work better with WMMT game files.