Slu/Sal'

maybe someone took a look at this Kastelio project. At their blog they define Hildegard of Bingen as Kastelio patron. Okay, I tried to find out why they choosed HoB for that. She also created a constructed language which is laŭ en.wikipedia.org "...In as much as the language was constructed by Hildegard, it may be considered one of the earliest known constructed languages..." Wow, that Kastelio folks did some very intensive historical research and found a mediaeval times semantic releationship to Esperanto. Cool. In my opinion.

That language also has striking similarities to the reconstruction of Proto-Germanic - e.g. the -z and -nz endings. Maybe even some Althochdeutsch in there...