No matter how good you are at Python, if you need to build an SPA, it'll be far faster to go with Javascript. This is true even if you have to learn Javascript

No matter how good you are at Python, if you need to build an SPA, it'll be far faster to go with Javascript. This is true even if you have to learn Javascript from scratch. If you're an expert at Pascal, good luck trying to use it on the Arduino. The hardest part of learning a second and third programming language is overcoming your own frustration. Yes there are some pretty gnarly concepts in languages like Haskell. However, most mainstream programming languages are very similar to each other.