In any legal proceedings in Wales the Welsh language may be spoken by any party, witness or other person who desires to use it, subject in the case of proceedings in a court other than a magistrates’ court to such prior notice as may be required by rules of court; and any necessary provision for interpretation shall be made accordingly.

Any power to make rules of court includes power to make provision as to the use, in proceedings in or having a connection with Wales, of documents in the Welsh language.