Which code language is more valuable for SEO experts?

Which code language is more valuable for SEO experts?

For Seo your website is built on any programming language or platform, it doesn’t matter much because it follows the normal HTML tag more. 

They also have no meaning in the backend of any website or application. Only works from the front-end user interface or normal web page. 

SEO is only the HTML tags and keywords in your web page, meta description, or robot. txt follows the file so the code makes no sense.