Function getLanguageCodeFromPath

middleware/detect-language.js:50–53

(path)

// determine language code from a path. Default to en if no valid match
export function getLanguageCodeFromPath(path) {
  const maybeLanguage = (path.split('/')[path.startsWith('/_next/data/') ? 4 : 1] || '').slice(0, 2)
  return languageKeys.includes(maybeLanguage) ? maybeLanguage : 'en'
}

export function getLanguageCodeFromHeader(req) {
  const browserLanguages = parser.parse(req.headers['accept-language'])