Okay, so I looked at the game you sent me and I found that Stencyl wasn't actually generating any of the accented characters for the compiled game. I guess setting the font to "Everything" only has it generate the typical English characters. Try opening your font, set Charset to "Custom" and type in all the characters you want in the "Characters" field. (Including A - Z, a - z, all the common stuff, and all the accented characters you need.)