Normally you don't use strange characters in filenames - you don't want problems. But this doesn't mean it can't be done, neither we should avoid it. In fact, applications like Word uses the first line of the document (the title) to suggest a default filename to the user, so if title has accents, so will filename...
Unfortunately, SAMBA doesn't seem to be prepared to show this filenames by default, and substitutes them with an underscore ("_"), so we should change the configuration this way: