The wikipedia page you refer has a Spanish translation which is similar to the French word galimatias, so I guess it’s the closest translation. I don’t hear it very often, though.

Apparently embrouillamini is considered as a synonym but may not be that suitable for abstract concepts.

I would rather recommend the more frequent charabia, or maybe sabir (although it may be offensive to certain populations, I don’t know).

I don’t think any of these carry the idea of being intentionally deceptive, though.