Currently there's a tag language and a tag languages. Both currently have no tag wiki entry. I'm not quite sure what each one of those is good for, on some posts they are used in the context of spoken languages, and on others in the context of a programming language. But for programming languages there's a separate tag.
So, what exactly are they meant to be?
Are they both for spoken languages? In that case one of them should become an alias for the other one.
Is one for spoken language and one for programming? In that case a wiki should be added to both, and/or one of them should be made into an alias of the programming-languages tag.
In any case, some questions using those tags need to be re-tagged depending on the meaning they will finally have. I would have suggested wiki edits, but didn't do it since I wasn't sure which was intended to be use for what. Not being a native speaker, it's pretty hard for me to say if any one of them standing for itself is clear enough to distinguish a programming context from a linguistic context.