Programming languages also change from version to version, but it is the creators of the language making the changes. In human languages, the changes are organically created by the users. Changes that don't end up being useful never take off.
I think it would be practically possible to build a pipeline for this to happen: allow users to extend/modify the language [0][1] and allow those extensions to be shared.
Some languages already have a process for taking popular 3rd party libraries and eventually integrating them into the standard library distributed with the compiler, the same could apply to language modifications.
[0] Modifying the language could involve _removing_ features .
[1] This may need to be more complicated than syntactic macros, which is currently the most common means of extending languages.