foundryvtt-reve-de-dragon/module/grammar.js

const articlesApostrophes = {
  'de' : 'd\'',
  'le' : 'l\'',
  'la' : 'l\''
}
export class Grammar {

  static apostrophe(article, word) {
    if (articlesApostrophes[article] && Grammar.startsWithVoyel(word)) {
      return articlesApostrophes[article] + word
    }
    return article + ' ' + word;
  }

  static startsWithVoyel(word) {
    return word.match(/^[aeiouy]/i)
  }

  static toLowerCaseNoAccent(words) {
    return  words?.toLowerCase().normalize("NFD").replace(/[\u0300-\u036f]/g, "") ?? words;
  }
}