Except as otherwise provided, the validity and interpretation of wills is governed, when relating to real property within this state, by the law of this state; when relating to personal property, by the law of the testator's domicile. R.L.1910, § 8336.
Law governing validity and interpretation of wills
84 O.S. § 20, under Wills and Succession.
84 O.S. § 20