MAME Languages.ini v0.148u1 is released. It supports file for MameUI, which attempts to catalog all of the MAME sets based on the language used by the game.

MAME Languages.ini v0.148u1 Changelog:
* 0.20 0.148 13/01/2013: Two error fixed (english > japanese, english > chinese).
* 0.21 0.148u1 15/02/2013: Added sets of the 0.148u1.

Download: MAME Languages.ini v0.148u1
Source: Here