The specific for adding a language to a live machine?

files from a machine with internet access and transfer them to the target offline machine via USB or network share. 4. Installation via DISM (Command Prompt)

Later that month, a different request arrived: Arabic for a contractor, then Polish for a consultant. The cabinet of kits grew like a small, deliberate library—Bulgarian, Vietnamese, Korean—each thumb drive a quiet promise. And when the power flickered once during a storm and left a dozen users in a blackout, Marco's kits were the only thing that didn't need a cloud to be useful.