Running Windows 10 Pro, most recent update available on each machine.
Remote Desktop is most recent version available downloaded today (6/4) on the machine with alphanumeric ID and version 2.4.0.47 on the machine I'm hoping to use to manage the other.
Regarding the language, everything is set to English (unless you're asking about some type of computer language, in which case, I'm probably not going to be able to answer that.)

On the computer I hope to use to manage the other computer remotely, you cannot anything except digits (even trying to paste something with letters strips out the letter characters and leaves only the numbers.)