Okla. Stat. tit. 20 § 1708
The Board may adopt rules establishing different levels of courtroom interpreter certifications recognized in the courts of this state including certified courtroom interpreters and registered courtroom interpreters. Every person enrolled as a certified courtroom interpreter shall be entitled to use the abbreviation C.C.I. after his or her name. Every person enrolled as a registered courtroom interpreter shall be entitled to use the abbreviation R.C.I. after his or her name. Courtroom interpreters holding a provisional status do not hold an official certification, and shall not be allowed the use of the abbreviation. Certified and registered courtroom interpreters shall be authorized to interpret spoken words and translate written text in all proceedings related to the case to which he or she has been assigned.
Okla. Stat. tit. 20, § 1708