You can post them to the Testers as trivial reports as Stiletto says.
btw I'm maintaining the Japanese game name list file which is used for various purposes (front ends, data base etc.) The file contains: MAME's rom name, full Japanese description, Japanese reading in hiragana (with some suffix for sorting) You can use it for any purpose.
Please be noticed that this list is made for Japanese usage. Regarding the descriptions, the Japanese name comes first and the "alternative" description for the "foreign" market is put down with it. Also in sorting, this ignores MAME's problematic master and clone sets hierarchy.
Fuji.
Fujix
MAME E2J
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