What about users of the languages? 2
If a language is “neglected”, there are individual productive users, at least “grandparents” and “parents”, maybe also children. Often the language competence of the users diminishes and the degree of diglossia (functional differentiation) grows from the “grandparent” generation to the children’s generation.
All of those “parents” who might belong to the user collectivity on the basis of their ethnic and/or linguistic background, are no longer users (even if some may be), neither are children (except maybe in language nests and Indigenous immersion programmes). Many or most “grandparents” form a user collectivity at some level.