A. A totally uninformed guess
or
B. The favorite language of the person responding
In either case, this whole exercise creates no value for anybody.
But even that is a stretch, you can build just about anything in any language.
The answer is really tied to (1) who's writing and maintaining the code (2) what's their background [dev or new to code?]
It's hard to give a better answer without more details. In the end you will likely be using dozens of languages and software packages.
Can you provide more details?