The C++ language itself shouldn't be tied to any one specific application or third party tool, though. Just because they exist doesn't mean you are forced to us

The C++ language itself shouldn't be tied to any one specific application or third party tool, though. Just because they exist doesn't mean you are forced to use them, this is one of those cases where f strings don't make a lot of sense. Things with localized labels or text ideally have an id that gets looked up, so you can't do English-based string composition. Every locale gets looked up, no "just pass through the key if locale X", and lookup failures don't "still work", they result in super obvious, user-reportable nonsense.