[development] Translatable strings for 1st/2nd/3rd/nth

Does anyone have suggestions for creating translatable strings for rankings? I need to generate strings for 1st/2nd/3rd/4th/etc. ideally without a limit, but don't know of a simple translatable solution. Right now I just have individual t() strings for 1st/2nd/3rd, then a blanket t($i .'th') for the rest, under the untested theory that translators could manually add translations for Nth into their .po files up to a reasonable limit. I realize that this will not work for extractor.php purposes and is English-centric. Thoughts? Thanks, Chris