Load the stopwords that you need in Pharo

Metacello new
  baseline: 'AIStopwords';
  repository: 'github://pharo-ai/stopwords/src';
  load.

If you want to add a dependency on stopwords to your project, include the following lines into your baseline method:

spec
  baseline: 'AIStopwords'
  with: [ spec repository: 'github://pharo-ai/stopwords/src' ].

If you are new to baselines and Metacello, check out the Baselines tutorial on Pharo Wiki.

You can use the class façade to quickly obtain a stop word Collection. It supports multiple stopwords repositories (implemented as subclasses), but a default list is automatically configured. Users could get a list of stop words for a language, you can use the pattern:

AIStopwords for<Language>.

for example:

AIStopwords forEnglish.
AIStopwords forSpanish.
AIStopwords forFrench.

To change the default stopword class for a language:

AIStopwordsEnglish defaultStopwordClass: aClass.

Stopwords list were collected from https://github.com/igorbrigadir/stopwords

Example of usage:

'This is Ground Control to Major Tom' removeStopwordsUsing: AIStopwords forEnglish

will answer a Collection without the stopwords:

#('Ground' 'Control' 'Major' 'Tom')

Stopwords now can be augmented with #addStopword: and #addStopwords:

AIStopwordsEngCoreNLP new addStopword: 'myStopword'.
AIStopwordsEngLuceneSolr new addStopwords: #('stopword1' 'stopword2').