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Suggestion (based on a comment discussion on another answer): create a category called "resources" or "wiki" or something similar.  In this category, use the article type (not Q&A).  Create one article per language for useful resources for that language.  Treat these as community-maintained articles, to be edited by anybody who can add to them.

In setting it up (and, in particular, in naming it), decide what other types of community-maintained articles might be useful.  For example, are there language-agnostic topics in linguistics that it would make sense to have on-site articles about?  Are there topics about a language that you might cover in articles that *aren't* resource lists?  You probably want to keep resource lists focused on *resource lists*, not more-expansive topics, but there's no reason you couldn't have several articles about the same language.  The category can use the same tag set as the Q&A category, which means searching on a tag returns results from both categories.

You could have a post, in the category or on meta, where people can make requests for topics to be covered in this new category.