Stop words are words which are filtered out during processing of text data. An example use case is Metagen::generateKeywords(), which eliminates stop words from the list of potential keywords.
Creates a new StopWords object that containes the stop word list for the current language.
Look up the word $key in the list of stop words and classify it as a significant word or a stop word.
Returns true if the word is significant, or false if it is a stop word.