Function pluralize

common/src/util/string.ts:183–243

(
  count: number,
  word: string,
  { includeCount = true }: { includeCount?: boolean } = {},
)

])

export const pluralize = (
  count: number,
  word: string,
  { includeCount = true }: { includeCount?: boolean } = {},
) => {
  let pluralWord: string
  const lowerWord = word.toLowerCase()

  if (count === 1) {
    pluralWord = word
  } else if (word === word.toUpperCase() && word.length > 1) {
    // Acronyms (API, SDK, URL, etc.) - just add 's'
    pluralWord = word + 's'
  } else if (IRREGULAR_PLURALS[lowerWord]) {
    // Check irregular plurals first (truly irregular words)
    pluralWord = IRREGULAR_PLURALS[lowerWord]
  } else if (UNCHANGING_PLURALS.has(lowerWord)) {
    // Specific words that don't change
    pluralWord = word
  } else if (lowerWord.endsWith('ware')) {
    // Rule: -ware words stay unchanged (software, hardware, firmware, malware, etc.)
    pluralWord = word
  } else if (lowerWord.endsWith('ics')) {
    // Rule: -ics words stay unchanged (analytics, graphics, physics, statistics, etc.)
    pluralWord = word
  } else if (lowerWord.endsWith('sis')) {
    // Rule: -sis → -ses (analysis→analyses, basis→bases, crisis→crises, etc.)
    pluralWord = word.slice(0, -2) + 'es'
  } else if (lowerWord.endsWith('xis')) {
    // Rule: -xis → -xes (axis→axes)
    pluralWord = word.slice(0, -2) + 'es'
  } else if (F_EXCEPTIONS.has(lowerWord)) {
    // -f words that just add -s
    pluralWord = word + 's'
  } else if (word.endsWith('f')) {
    // Handle words ending in -f → -ves
    pluralWord = word.slice(0, -1) + 'ves'
  } else if (word.endsWith('fe')) {
    // Handle words ending in -fe → -ves
    pluralWord = word.slice(0, -2) + 'ves'
  } else if (word.endsWith('y') && !word.match(/[aeiou]y$/)) {
    // Handle words ending in 'y' (unless preceded by a vowel)
    pluralWord = word.slice(0, -1) + 'ies'
  } else if (O_EXCEPTIONS.has(lowerWord)) {
    // -o words that just add -s
    pluralWord = word + 's'
  } else if (word.match(/[cs]h$/) || word.match(/o$/)) {
    // Handle words ending in sh, ch, o → add -es
    pluralWord = word + 'es'
  } else if (word.match(/[^z]z$/)) {
    // Single z at end (not zz) → double the z and add -es (quiz → quizzes)
    pluralWord = word + 'zes'
  } else if (word.match(/[sxz]$/)) {
    // Handle words ending in s, x, zz → add -es
    pluralWord = word + 'es'
  } else {
    pluralWord = word + 's'
  }