Function getEnglishSourcePath

scripts/translationUtils.ts:36–45

(filepath: string)

 * e.g., 'src/2014/de/5e-SRD-Spells.json' -> 'src/2014/en/5e-SRD-Spells.json'
 */
export function getEnglishSourcePath(filepath: string): string | null {
  const parts = filepath.split('/');
  const yearIdx = parts.findIndex((p) => YEAR_DIR_PATTERN.test(p));
  if (yearIdx < 0) return null;
  const localeSegment = parts[yearIdx + 1];
  if (!localeSegment || !LOCALE_PATTERN.test(localeSegment)) return null;
  const result = [...parts];
  result[yearIdx + 1] = 'en';
  return result.join('/');
}

/**
 * Validates a single translation entry against the English source map and