The TreeTagger is a program developed by Helmut Schmid at the University of Stuttgart (now at the University of München), for part-of-speech tagging and lemmatization. Language models (known as “parameters”, file extension .par) are supplied on the TreeTagger webpage for using the program with texts in English, French, German, Italian, Spanish, Russian, Bulgarian, Dutch, Estonian, Finnish, Galician, Latin, Mongolian, Polish, Slovak and Swahili, and models for some other languages are available from sites linked to the TreeTagger webpage. For a language for which no model exists, it is necessary to hand-tag some text, and then run a training program (provided with the TreeTagger) to create the model.