Is thinking about which language to choose premature optimisation?

I am thinking of developing my abstraction layer in graphQL. While searching I found apollo to be a well known framework to implement graphql. As I was looking over documentation most of it is in Javascript (using node). Javascript is an widely popular language, but I am more comfortable with Typescript. I feel Typescript is more scalable then Javascript as it is more typed language. So I wanted to develop an apollo server in Typescript. Should I think about it or start with Javascript? Is this kind of thinking premature optimisation?