Stephen J. Turnbull:
Will it accept Arabic on input? (Han might be too much to ask for since Unicode considers Han digits to be "impure".)
I couldn't find a direct way to input Arabic digits into OO Calc, the normal use of Alt+number didn't work in Calc although it did in WordPad where Alt+1632 is ٠ and so on.
OO Calc does have settings in the Complex Text Layout section for choosing different numerals but I don't understand the interaction of choices here.