This is the 10959th most frequent Turkish word.
dillerini
"Dillerini" means "their languages" in English.
In this sentence, 'dillerini' refers to the plural form of 'languages' possessed by someone.
Öğretmen dillerini öğrencilerine öğretir.
The teacher teaches their languages to students.
Here, 'dillerini' refers to the individual's ability to use their language effectively.
Arkadaşlarımı etkiledi, çünkü dillerini çok güzel kullanıyor.
She impressed my friends because she uses her language very well.
'Dillerini' in this context refers to the languages that the speakers know and potentially teach.