"Complete" library of all* scriptures with all** possible writing systems. And a (admittedly terrible) text-to-speech to read the script aloud.
*Up to a certain length.
**...that use distinct symbols (or 'letters', 'glyphes') for language representation.
You can enter seeds via the URL parameter.
Alphabets are random. Writing directions are random. Pronounciations are random, but one-to-one matching with the symbols. (more like, say, Turkish or Hungarian or Japanese rather than English or French).