Attached you will find the Nim word file and a test file as well.
The thing to note is that UE cannot support both types of comments that Nim supports.
Single line comments start with a "#". With the following being a comment:
# This is a comment
Multi-line comments are in the form of "#[ ]#". With the following being a comment:
#[
This is is a multi-line comment in Nim
]#
I have only added support for the single-line since I was told the multi-line was not doable with the current wordfile syntax.
You can do what you will with it. : )
Nim.zip