Hi anon044949,
I guess the answer depends a lot on what you mean by “having a specialized font created”. Creating quality fonts from scratch is lengthy and costly process, and even modifying existing open-source fonts takes specialized skills and tools and is still pretty costly (in time if not money).
On the other hand, if the fonts already have user-selectable features that do what you need, then it is simply a matter of turning on the desired feature(s) using the formatting or style menus in your application (assuming it provides a user-interface to access the features).
Or were you thinking of an easier mechanism such as SIL’s TypeTuner Web? This, of course, simply uses the features already in the font and is provided as a stop-gap for applications that don’t provide a user-interface for feature selection.
I’m not a Paratext user so don’t know what limitations it may have, but all of the following SIL-provided fonts have user-selectable features (usually implemented in both Graphite and OpenType technologies):
- Abyssinica SIL
- Andika
- Annapurna SIL
- Charis SIL
- Doulos SIL
- Gentium
- Harmattan
- Scheherazae
and I’ve probably missed some. You can find links to all of these (and more) on the NRSI fonts page.