As a recruiter, it is clear that the most successful languages still growing in popularity in 2022 are:

C#

JavaScript/TypeScript

Python

Edit: golang is small in terms usage but is on the way up definitely

All the rest are in decline or remaining at a constant level of acceptance.

So if hiring / recruiting is important, use C# or TypeScript or Python.

If you want to cause yourself deep hiring/recruiting pain, build your systems with Ruby or use lesser known frameworks and languages such as Erlang/Elixir.

C# seems like an excellent choice for Linux based development - it's mature, there's a vast talent pool, theres vast knowledge and community resource for getting problems and questions answered.