http://bugs.winehq.org/show_bug.cgi?id=29850
--- Comment #3 from Qian Hong fracting@gmail.com 2012-02-29 23:38:06 CST --- Hello, found a workaround:
$ cd ~/.wine/drive_c/Program\ Files/scilab-5.3.2/java/JRE/lib/fonts
$ ls
LucidaBrightDemiBold.ttf LucidaSansDemiBold.ttf LucidaBrightDemiItalic.ttf LucidaSansRegular.ttf LucidaBrightItalic.ttf LucidaTypewriterBold.ttf LucidaBrightRegular.ttf LucidaTypewriterRegular.ttf
$ mkdir fallback
$ cp /usr/share/fonts/truetype/wqy/wqy-microhei.ttc ./
Start Scilab again and this time Chinese display correctly. But there is an anti-aliasing issue, and that should be another bug.