Okla. Stat. tit. 22, § 22-658: Causes for challenge, in general

General causes of challenges are:

1. A conviction for felony.

2. A want of any of the qualifications prescribed by law, to

render a person a competent juror, including a want of knowledge of

the English language as used in the courts.

3. Unsoundness of mind, or such defect in the faculties of the

mind or organs of the body as renders him incapable of performing

the duties of a juror.