When you set up your Webfont project, you are asked which languages you plan to use. We then include the necessary characters for the given languages. Sometimes it happens that foreign names or words need other character. If this happens, simply add the missing language, or the specific glyph to the Webfont. Login to your Typotheque online account, go to Webfonts, and click to Edit your webfont project. Add more languages or create Custom set with the missing characters.