Dialectology and Language History (head Dr. philol. Anna Stafecka)
Onomastics (head Dr. philol. Renāte Siliņa-Piņķe)
Latvian Grammar (head Dr. philol. Juris Grigorjevs)
Lexicology and Lexicography (head Dr. philol. Agris Timuška)
Sociolinguistics (head Dr. habil. philol. Ina Druviete)
Terminology (head Dr. philol. Regina Kvašytė)