Cal. Fin. Code § 5652
Except as otherwise authorized under existing law, no person, unless lawfully authorized to do business in this state under the provisions of this division and who is actually engaged in carrying on a savings association business, shall:
(a) Do business under any name or title that contains the following terms:
(7) Any combination employing one or more of the words “saving,” “savings,” or words of similar import with one or more of the words “association,” “bank,” “institution,” “society,” “company,” “fund,” “corporation,” or words of similar import.
Notwithstanding the provisions of this subdivision, use of the term “savings bank” in a name or title is not prohibited to any person regulated by the provisions of Division 1 (commencing with Section 99), Division 7 (commencing with Section 18000), or under procedures and regulations promulgated by the Comptroller of the Currency, Federal Reserve Board, Office of Thrift Supervision, Federal Housing Finance Board, or Federal Deposit Insurance Corporation. Any reference to the term “savings bank” in this division is not intended to apply to any person other than persons authorized to do business in this state under this division.