Some of the things in Swift look a bit like wombat. Types acting as namespaces, at least for enumerations. Also we see "." as a prefix which gives the appearance of wombat atoms. Of course Swift is much more ad hoc than wombat.
It is nice to see the Mercury language getting more activity. It was an inspiration for the invertible functions in wombat, and I am sure there is more improvement to be made in that aspect of wombat.