They're actively working on this, with the goal of ultimately building a language-independent representation[0] of ordinary encyclopedic text. Much like a machine translation interlanguage, but something that would be mostly authored by humans, not auto-generated from existing natural-language text. See https://meta.wikimedia.org/wiki/Abstract_Wikipedia for more information.
[0] Of course, there are some very well-known pitfalls to this general idea: what's the true, canonical language-independent representation of nimium saepe valedīxit? So this should probably be understood as mostly language-independent, enough to be practically useful.