Okla. Stat. tit. 12, § 12-729.13: Foreign money revalorization

A. If, after an obligation is expressed or a loss is incurred

in a foreign money, the country issuing or adopting that money

substitutes a new money in place of that money, the obligation or

the loss is treated as if expressed or incurred in the new money at

the rate of conversion the issuing country establishes for the

payment of like obligations or losses denominated in the former

money.

B. If substitution under subsection A of this section occurs

after a judgment or award is entered on a foreign-money claim, the

court or arbitrator shall amend the judgment or award by a like

conversion of the former money.