A Part-of-Speech (PoS) tagger reads in text and tags each token with a text string that indicates the word's part of speech and other grammatical features, such as case, grammatical gender and tense.
The PoS tagger used here is simply called ABLTagger 3.0. It is maintained by The Language and Voice Technology Lab at the University of Reykjavík (CADIA-LVL) (CADIA-LVL). The groundwork for this tool was the Bi-LSTM tagger ABLTagger 1.0. which was originally developed by Steinþór Steingrímsson, Örvar Kárason and Hrafn Loftsson in the spring of 2019.