"A Lingua Ignota (Latin for "unknown language") was described by the 12th century abbess of Rupertsberg, Hildegard of Bingen, who apparently used it for mystical purposes. To write it, she used an alphabet of 23 letters, the litterae ignotae."
This font contains those letters, including automatic ligatures for turning "et" into "&" (which just looks like those two letters attached) and a ligature for "est". The only punctuation I found with this script was the period, but I know that others were used, or at least will be useful now, so the comma and question mark are my own invention.
The preview reads:
Ecclesia, armis divinis praecincta, et hyacinto ornata, tu es caldemia
et urbs scienciarum. O, o tu es etiam crizanta
in alto sono, et es chorzta
The words in italic are not all identified, but the others are Latin and easily translated. The full translation may go something like this:
"O measureless Church, / girded with divine arms / and adorned with jacinth, / you are the fragrance of the wounds of nations / and the city of sciences. / O, o, and you are anointed / amid noble sound, / and you are a sparkling gem."