That sounds like a very specific and useful utility, particularly for system administrators or power users who deal with deploying Windows 10 in environments with limited or no internet connectivity.
: Run the Windows 10 Offline Language Packages Installer v1.5.exe with Administrator privileges. Windows 10 Offline Language Packages Installer v1.5 -v1903
For mass deployment via MDT or SCCM:
: Installs not just the display language, but also associated features like text-to-speech, handwriting recognition, and speech recognition. That sounds like a very specific and useful
The v1.5 installer comes with a silent switch. Open and run: but also associated features like text-to-speech
: Updating language settings on PCs in high-security or remote areas that cannot connect to Microsoft servers.