nl_tokens: Retrieve the relevant words . Uses cached version when possible .
pl_tokens: function getRelevantWords ( <mask> , locale ) { if ( ! isEqual ( text , previousRelevantWords . text ) || ! isEqual ( locale , previousRelevantWords . locale ) ) { previousRelevantWords = { text , locale , data : calculateRelevantWords ( text , locale ) , } ; } return previousRelevantWords . data ; }