NLTK is a platform for programming in Python to process natural language. NLTK provides a lot of text processing libraries, mostly for English. Formerly, I have built a model of Indonesian tagger using Stanford POS Tagger. That Indonesian model is used for this tutorial. To install NLTK, you can run the following command in your command line. I assume that you are using Windows and you have read and followed my first tutorial (in Indonesian) of having two versions of Python in your laptop : python3 -m pip install -U nltk In this example, I use a previously trained tagger which I name myTagger.model . It is a model customized for Indonesian. Place the model under the nltk folder so that it will be nltk\myTagger.model . Download the stanford-postagger.jar from http://nlp.stanford.edu/software/tagger.shtml . To run this tagger, write the following codes in command prompt: import nltk from nltk import * myTagger = StanfordPOSTagger(myTagger.model...