Few days ago one guy on #cacko (Cacko & PdaX distros support channel) told that OPIE cannot do russian (atleast I understand it in this way). So I started checking…
Since few months we use TrueType fonts in OPIE by default — DejaVu Sans is used. This font has very nice glyph coverage so it should be no problem.
Example picture with Greek, Russian, German and few other langs:
