I see projects with different programming languages. When a new language comes in, it’s often trendy, and developers want pay for trying it out. Personally, I don’t like these mixed projects. I prefer ones using a single programming language, so any developer can work on any part of the project. The same goes for automated tests – using the project’s main language is simpler and makes tests more understandable.
![](http://expectedbits.com/wp-content/uploads/2023/01/annie-spratt-sggw4-qDD54-unsplash-e1673947344452-1024x701.jpg)