And who exactly is talking about "embedding" business logic in the i18n framework? Every serious framework I've used has supported placeholders, so at the application level you just select between singular and plural form and then the translation framework can handle arranging the words.
e.g. `items.length == 1 ? _t("%d item", items.length) : _t("%d items", items.length)` and then within your translation files you can specify translations that rearrange the phrase, like "<noun> %d" for languages where they are reversed.
(though usually of course, you would use much longer phrases, so that the translation is done in-context.)