Going to chime in on this.
Programming languages over the next year or so is going to grow drastically for Unreal. This is just me looking at the programming languages that are coming out so far.
It would not surprise me If we see C# Support for Unreal.
To drive my point home -
Unofficial Python support was just released today - GitHub - 20tab/UnrealEnginePython: Embed Python in Unreal Engine 4
We have Skookum Script - http://skookumscript.com/
We also have UnrealJS - GitHub - ncsoft/Unreal.js: Unreal.js: Javascript runtime built for UnrealEngine 4