Languages department is one of the academic departments at Tiwi Girls Secondary. It's the largest department comprising eight members. It is subdivided into two sub departments: Kiswahili and English respectively. It is headed by Madam Irene and two HOS i.e Mr Watulo Samuel (English) and Madam Salama (Kiswahili).
The following are the other members of the department:
Mr. Mwaliki Harrison
Mr. Sidney Shiundu
Md. Judith Nekesa
Md. Marion Elegwa
Mr. Suleiman Joto
Motto: To be the best performing department in every national exam in the school.