I intend to write an extensive fantasy series. There is a plethora of different languages and cultures in the series, and I've developed language systems and alphabets for some of those cultures, including unique lettering. It is possible that at some point in the series, I would like to include samples of those letters.
What should I do to achieve this? Should I learn a font-creation software and make them myself? Should I hire a professional? Does the publisher take care of the whole thing? What's the best option, in terms of getting it done right (as opposed to just the easiest way to get away with it)?
Note: I do want a custom font, which I can safely and legally use on my own fan-site if I so wished. Not just the letters used in the novels, the whole alphabet.