Languages

 
Here are langauges that are from magical creatures that are in the books:

*Fairy - (fairies use a form of buzzing to communicate with themselves)
 
*Gobbledegook - (goblin language)
     "bladvak" means "axe" in Gobbledegook (GF24)
 
*Mermish - (merfolk language used above water; Merfolk speak human languages under the water)

*Parseltongue - (snake; it is a hissing sound) 
 
*Troll - ("Anyone can speak Troll. All you have to do is point and grunt.." - Fred Weasely)