unspoken rule

Noun

 * 1) A rule that is understood to apply but does not exist in written form.

Translations

 * Arabic: قاعدة غير مكتوب
 * Armenian: չգրված օրենք
 * Chinese:
 * Mandarin:, 默認規則
 * Czech: nepsané pravidlo
 * Dutch: ongeschreven regel
 * Finnish: kirjoittamaton sääntö
 * French: règle non écrite, loi orale
 * German: ungeschriebene Regel,
 * Hindi:
 * Hungarian: íratlan szabály
 * Japanese:
 * Korean: 불문율, 불문법
 * Polish:
 * Romanian:
 * Russian: непи́саный зако́н, негла́сное пра́вило
 * Spanish: regla no escrita
 * Ukrainian: непи́саний зако́н, негла́сне пра́вило