MAME Languages.ini v0.160 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 v0.160 Changelog:
* 0.40 0.158 02/02/2015: Added 0.158 sets.

Download: MAME Languages.ini v0.160
Source: Here