Subtitler:Can I use Subtitler with non-Roman character sets

Can I use Subtitler with non-Roman character sets (chinese, japanese, arabic, hebrew, persian)?

On OS X yes. You can even have one line of Roman and one line of non-Roman characters for the fonts which support that (for example Lucida Grande). Note that character spacing is disabled for Non-Roman fonts and that simple and smart wrap work only on langauge with spaces (eg not in chinese and japanese).
On OS 9 it may work with some fonts, but we do not officially support it.