PROMPT is always in ASCII. This was my assumption. Is it bad?
Okuji
Possibly, it is not so bad, but unexpectedly. It seems (e.g. to me) that grub_cmdline_get() simply makes grub_printf() call (without any `byte length` restrictions).
Furthermore, if user wanna make `i18n prompt request` in his native language module we incline him to use separate grub_printf() & grub_cmdline_get("" - prompt) calls.