Comment 7 for bug 827417

This problem is located in the translation of the applications. The comment in the *.desktop file gets translated with those CJK chars.

Here is where the incorrect translation lies for gbrainy
http://bazaar.launchpad.net/~vcs-imports/gbrainy/master/view/head:/po/zh_CN.po#L715

Same for gnome-sudoku
http://bazaar.launchpad.net/~vcs-imports/gnome-games/master/view/head:/po/zh_CN.po#L5011

You can confirm it even more so if you copy that entire line and search it in the dash. ie. screen shot:
sudoku: http://imgur.com/U2s8D
gbrainy: http://imgur.com/Rf5dB