Do languages "learn"?
This is a good question and a great Linguistics research topic.
The page here is about learning to speak, read and write languages. The phrase "language learning" is not uncommonly used in this sense.
The topic you suggest would be of interest to educators and to some learners and could be an optional part of a curriculum.
Perhaps make a separate page with an appropriate title (e.g.) "Language evolution" and link to it under "See Also". You could also start a broader topic such as "Linguistics" and include a suitable place for your topic of interest.
Obviously one can view it as a "Linguistic research topic", but there is more here. The observations voiced by the South African Institute for Distance Education (SAIDE) in its Unit One: Exploring What It Means To ‘Do’ Mathematics. provides an example of how a new idea introduce itself. SAIDE's observations are not isolated, but every learning community experiences this process - even the United States in the 1960's.