That doesn't mean Latin is not a useful key to learning other languages for native English speakers. English lacks many of the concepts that exist in a lot of

That doesn't mean Latin is not a useful key to learning other languages for native English speakers. English lacks many of the concepts that exist in a lot of European languages; no grammatical gender, almost no noun case, verb conjugation has little inflexion, etc, etc. Since Latin possesses these features it is a useful reference language for many European and even many non-European languages. Now, I'm not sure where you're from exactly, but a lot of the languages in the former Soviet block also do tend to exhibit a lot of these features so Latin would probably not be as needed there.