/**
 * Basic Dutch pluralisation for configurable event labels.
 * Covers the known sub_event_label values: Dag, Programmaonderdeel, Editie, Locatie, Ronde.
 */
export function dutchPlural(word: string): string {
  // Words ending in -ie: add -s (editie → edities, locatie → locaties)
  if (word.endsWith('ie'))
    return `${word}s`

  // Words ending in -e: add -s (ronde → rondes)
  if (word.endsWith('e'))
    return `${word}s`

  // Double vowel before final consonant(s): single vowel + en (onderdeel → onderdelen)
  const match = word.match(/^(.*)([aeiou])\2([^aeiou]+)$/i)
  if (match)
    return `${match[1]}${match[2]}${match[3]}en`

  // Default: add -en (dag → dagen)
  return `${word}en`
}