I like knowing what language something is coded in. It makes me more likely to look into the project. If it's written in something I'm not interested in I may click through, but not be as thorough, and some languages I save the link for later because I have no interest in them professionally or on my time off. I like looking at all projects eventually because some people come up with amazing pieces of software in all types of languages, but others might not care to look at a Ruby, PHP, NodeJS, Python, C, C++, Rust etc project.