For several Symfony parts, caching is done within the component itself, for instance, the Router. The Translation component, however, is different. Caching catalogues is done in the FrameworkBundle’s Translator, and not in the component. This makes cached translations hard to use outside Symfony, for instance in Silex projects.

Why is this? Would it make sense to move the caching of translation catalogues into the Translation component (and out of the FrameworkBundle)?