Adding NON-English to caption to command button

[Excelgreenhand]

I would like to add other language (non-English like Chinese/Japanese) to the caption of Command button and they show up as ?? (no of ? corresponds to number of original character).
The working around is using VBA to refer a cell address which contains the non-English characters/words and it works.
Any other correct ways to achieve this!?
Thank you!