In any suit for a sum of money expressed in any foreign currency, or otherwise than in the money of account of this state, the jury, if there be one impaneled for any other purpose, and if not, the court, shall ascertain the value in such money of account of the sum so expressed, making such allowance for the difference of exchange as shall be just; and the judgment or decree may either be for what may be so ascertained, or for the sum of money expressed as aforesaid to be discharged by the sum so ascertained.
West Virginia Legal Code