To install a Microsoft Windows 10 language pack offline, you must manually acquire and install either a CAB (.cab) file or a Local Experience Pack (.appx). The standard "Add a language" feature in Settings requires an active internet connection to download files. 1. Download Required Files
Obtain the correct .cab file from:
Basic UI translation is not enough. For the "Extra" experience, install handwriting, OCR, and speech. Microsoft Windows 10 Language Pack Offline Install -Extra
. This is particularly useful for enterprise deployments or air-gapped systems. Offline Installation Steps To install a Microsoft Windows 10 language pack