If they're open to the idea of us forking the code, implementing a "Froala type system" for translating and then accepting that into the main CodeMirror release then we'll do that. Otherwise, we might have to either just accept this isn't translatable or fork and write the implementation ourselves, and then maintain it going forward (which wouldn't be ideal).
We've now written a language independence system for CodeMirror, and we are waiting for it to (hopefully) be integrated into CodeMirror itself, at which point this issue will disappear and CodeMirror will make use of XF phrases.