new to rockbox, difficulties in settings of correct language display

[INGRAMLI]

I have just started using the Rockbox on iRiver H10, and i have some folders and songs file name named in Japanese, i read the manual and just to switch the language in the general setting>Display>Default Codepage to Japanese (SJIS), but those folders and song file still don't display correctly, how to fix it?

p.s. solved by switching to unifont, but another new problem, the fonts are too big to display, can the size of the unifont be adjusted?

[LambdaCalculus]

Unifont only comes in that one size.

You can also try using the Sazanami fonts in the font pack.