https://github.com/SimpleMachines/SMF2.1/blob/40e0e3910096b4d72fa7923a0187e5855f6d6a05/Themes/default/languages/ManagePaid.english.php#L17 If we'd use [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217) codes, this wouldn't even have to be a language string, right?
