Hi, there are many languages like:
(?¿) Gharonk Language: This is the most rare language in tibia and can only be found in Jakundaf Desert Library
Chakoya Language : This is the language of the chakoyas, the little dudes near Svargrond
Elven Language: This is the language of the elves, you can found a lot of this in Ab'dendriel
Orc Language: This is the language of Orcs and there is not much information about it
Cyclops Language: This one its funny, Cyc in tibia have their own language and in fact you can find a book of this the "Cyclops ABC (Book)" with 0 information of the language haha, but we know some words of this language that reference metals like Za'Ralator which refers to a Demon iron
Demons Language: This is one of the most rares languages in tibia, we know that demons have a language cause they say "CHAMEK ATH UTHUL ARAK" and we can found a very strange book in serpentine tower that have this words "Chamek at uthul hatradek", so they can be related
Minotaur Language: "KAPLAR!", This one its funny, Minotaurs don't "have a language", they have this word which is a reference to "Qapla, a Klingon's word
Human Language: English
Deepling Language(Jekhr): Deeplings have they own language and you can found a lot of this in the books in Gray Island
Bonelord Language(469): This is the most frustrating language of all, the only thing that I'm going to say its 1 its Tibia and you can found a lot of this language in the Hellgate Library, but good luck on this one
Djinn Language: Djinns have an ancient code of honour like "DJANNI'HAH" So we can assume that it is very possible that there is a language
Dworc Language: This little dudes say a few words like ("Prek tars, dekklep zurk."."Grow truk grrrrr."; "Brak brrretz!)so, we can assume that they have they own language
Caveman Language: Near Zao we can found a little tribe of cavemans and they speak a kind of English
Wolves Language: We can found a book in POH with the name "The language of the Wolves" so can be a language
"Zarganash" Language": In fact Zarganash its a "word" of an ancient language which we don't know
And I'm pretty sure I'm forgetting some languages hehe