Why do we (Anglophones) use the native language name for some countries (Costa Rica, not Rich Coast), but not for others (Germany, not Deutschland)?

Question

Why do we (Anglophones) use the native language name for some countries (Costa Rica, not Rich Coast), but not for others (Germany, not Deutschland)?

In: 4271

Answer 1

I wondered the same thing, but about Taco Bell sauce packets. Why is one “Salsa Verde” and right next to it is “Fire Sauce?”