Follow Your Passion: A Seamless Tumblr Journey
I also have a hedcanon that Mrs. Sartori knows Italian very well
Each of the main mod frogs is (at least) bilingual
Jamack=English+French
Harris=English+Portuguese+Spanish
Kwat=English+Spanish+French
Mrs Sartori=English+Chinese (don't ask me why)
Headcannon that most mod frogs take language "classes"