MAME Languages.ini v0.148u5 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 v0.148u5 Changelog:
* 0.26 0.148u5 22/05/2013: Added sets of the 0.148u5.

Download: MAME Languages.ini v0.148u5
Source: Here