Here's a real life tangential example: I'm learning Thai. When I first started it was useful to show the Latin alphabet to get a grasp but it's often difficult or inaccurate to try to express that language without the system designed to express it. For instance, many romanizations lack a tone marker for tonal language, or don't show vowel length when it matters. Or for laughable example of พร, meaning 'blessing' but also a common woman's name, being traditionally romanized to 'porn' with its silent r when 'pawn' is a more neutral pronunciation for all English dialects (or /pʰɔːn/). Also, not being able to read or write the language, you will have a difficult time effectively engaging with the community and understanding the world around you.

The point is, functional languages are designed to express these concepts with much, much less cruft with extra features like currying, immutability-by-default, and type classes. Yes, use your current language to get oriented, but if you're going to really learn it, pick up a proper syntax to express it.