2009 California Code of Civil Procedure - Section 1297.221-1297.224 :: Article 5. Language

1297.221.  The parties may agree upon the language or languages to
be used in the arbitral proceedings.

1297.222.  Failing any agreement referred to in Section 1297.221,
the arbitral tribunal shall determine the language or languages to be
used in the arbitral proceedings.

1297.223.  The agreement or determination, unless otherwise
specified, shall apply to any written statement by a party, any
hearing, and any arbitral award, decision, or other communication by
the arbitral tribunal.

1297.224.  The arbitral tribunal may order that any documentary
evidence shall be accompanied by a translation into the language or
languages agreed upon by the parties or determined by the arbitral
tribunal.