Add documentation about using US-English
What does this MR do?
Add documentation about using US-English
Are there points in the code the reviewer needs to double check?
Make sure this is what we want to move forward with.
Why was this MR needed?
Consistency
Screenshots (if relevant)
None
Does this MR meet the acceptance criteria?
Yes
What are the relevant issue numbers?
Closes #40675 (closed)