My first thought was that it should be linguae francae in English. We may not have adjective agreement but we do tend to modify...
6 Answers · Education & Reference · 29/06/2009
http://en. wikipedia .org/wiki/ Lingua _ franca Hope it helps
4 Answers · Education & Reference · 28/07/2008
...language or foreign language to the population, such as a national language, standard language, or lingua franca ." http://en. wikipedia .org/wiki/Vernacular
1 Answers · Education & Reference · 12/05/2013
...hellenization of the eastern mediterranean caused a sort of lingua - franca version of greek to evolve. The community of commonwealth... here for further reading: http://en. wikipedia .org/wiki/Ancient_Greek
2 Answers · Education & Reference · 15/12/2012