Teach Serbian online with your own materials
Letros started in a school of Serbian as a foreign language. It handles Latin and Cyrillic, č, ć, š, ž and đ, and turns the textbooks you already use into interactive exercises.

Built with teachers of Serbian
Most platforms for language teachers are made for English. Serbian teachers usually work from their own worksheets and the few textbooks that exist, and spend hours retyping them. Letros was designed in a working school of Serbian for foreigners, and its first courses were Serbian A1 and A2.
Your textbook becomes interactive
Photograph a page from your textbook or upload a PDF: Letros recognises the exercise, picks its type and fills in the answers, with every diacritic in place. Cases, verb aspects and word order become fill-in-the-blank, word choice, drag-and-drop and word-order exercises that check themselves.
Need more practice on a topic? Describe it, and AI builds several exercises in Serbian for you to review.
Made for students who learn Serbian as adults
- Students sign in with a login and password you create, no email needed
- The interface is available in nine languages, among them English, Spanish, Russian, Ukrainian and Serbian, so beginners understand every button
- A student dictionary: tap a word to see its translation and save it for practice
- Homework with a due date, and written answers that you correct and return
Also for Croatian, Bosnian and Montenegrin
Everything above works the same for Croatian, Bosnian and Montenegrin courses, and for any other language you teach.
Questions and answers
Does Letros support Cyrillic?
Yes. Courses can be written in Latin or Cyrillic, and exercises are checked letter by letter, diacritics included.
Is there a ready Serbian course?
Letros is a platform for your own materials: you build courses from your textbooks and worksheets, and AI helps you fill the gaps.
Can I use it for one student?
Yes. A private teacher gets a personal workspace; the free plan covers up to 4 active students.
Is the interface available in Serbian?
Yes, in Serbian Latin, and also in English, German, Spanish, French, Portuguese, Turkish, Russian and Ukrainian.
Ready for tomorrow's lesson?