Accented characters mess up on mac?

hi there,
so i did a project which i thought was completed, but apparently it is not. i made buttons of peoples names which include accented characters. i also made these using the dynamic text. but it’s not actually dynamic text - it’s regular text in a dynamic setting because it wast he only way i could figure out to make the text clear and legible. anyway, on a pc everything looks fine. but my clients have macs and they said that the names(buttons) containing these accented characters (french and portuguese) look as if they are done in a different font than the rest of the page. i don’t have a clue why this is happening. i’ve read things about unicode and dynamic text and all that, but the things is i’m not actually importing text from anywhere, therefore all the instruction on this doesn’t seem to be relevant. any ideas??
thanks!