Out of 6 languages recommended by the NSA, 4 are patended bvy multibillion comanies who can pull the plug on them at any time (and Oracle already tried that).
C# - PATENTED by Microsoft,
Go - PATENTED by Google
Java - PATENTED by Oracle, NOT FREE
Python - not too shabby
Rust - not too shabby
Swift - PATENTED by Apple
@sos Patents only last 17 years, so C# will no longer be patented.
It has also gone fully open source - while they retain (c) I'm sure. So not quite the same here.