Right of lien holder to pay taxes or redeem from sale--Addition to lien--Interest rate

Any person who has a lien on any real property sold or about to be sold for taxes or on which the taxes are delinquent and unpaid may redeem from the tax sale if the real property is subject to redemption or may pay the taxes, interest, penalty, and costs that are delinquent. The receipt of the treasurer or the tax certificate of redemption constitutes an increase of the amount of the lien held by the party paying the taxes or making the redemption. The amount paid and the interest on the amount at the rate specified in the lien instrument, or if none is specified then at the rate that the taxes would bear according to law, shall be collected with, as a part of, and in the same manner as the amount secured by the original lien.