California Code, Code of Civil Procedure - CCP § 224

(a) If a party does not cause the removal by challenge of an individual juror who is deaf, hard of hearing, blind, visually impaired, or speech impaired and who requires auxiliary services to facilitate communication, the party shall stipulate to the presence of a service provider in the jury room during jury deliberations, and prepare and deliver to the court proposed jury instructions to the service provider.

(b) As used in this section, “service provider” includes, but is not limited to, a person who is a sign language interpreter, oral interpreter, deaf-blind interpreter, reader, or speech interpreter. If auxiliary services are required during the course of jury deliberations, the court shall instruct the jury and the service provider that the service provider for the juror with a disability is not to participate in the jury's deliberations in any manner except to facilitate communication between the juror with a disability and other jurors.

(c) The court shall appoint a service provider whose services are needed by a juror with a disability to facilitate communication or participation. A sign language interpreter, oral interpreter, or deaf-blind interpreter appointed pursuant to this section shall be a qualified interpreter, as defined in subdivision (f) of Section 754 of the Evidence Code. Service providers appointed by the court under this subdivision shall be compensated in the same manner as provided in subdivision (i) of Section 754 of the Evidence Code.