IF talking server-side, it shouldn't matter. IF you are making a website they ALL have to output HTML, and in terms of SEO the only thing that matters is? HTML. If a language can output to console, they can output HTML. Websites are HTML, if you have HTML you're fine. You have semantic markup -- aka using HTML PROPERLY (very tempted to stop calling it semantic markup) -- of content of value, you're GOLDEN.
Mind you, using some tools can make the job harder -- visual studio when it comes to ASP.NET pages can really just behave like an incontinent cat on brand new carpets, making a mess that will never come out and you end up having to throw it away and start over (probably buying brown carpets). Using WYSIWYG editors can result in non-semantic markup that can really hamper your efforts since they vomit up presentational markup -- an accessibility mess; and usually if it's an accessibility mess, it's a mess for search too.
But the programming languages themselves? Those really aren't a problem. As long as you're outputting good HTML from them, it doesn't matter what language is gluing that HTML together.