Attached is an updated en_us.json file with many grammar and spelling fixes. I can't promise that I caught them all, but I did catch most of them.

en_us.json.txt

(Renamed .txt because GitHub didn't like the .json extension.)

thank you for your work, I transformed your file into a pull request (#22) to better see the changes you have done. I also recomand you to do PRs because it simplify the work for the author and add your name to the contributors list on github.

That means learning Git commands. :)

in 2.4.13