To ensure stability and security, it is recommended to download the version of the language pack, which rolls up all previous updates.

Double-click the downloaded .exe file and follow the on-screen prompts to complete the installation. Configuring Thai as Your Primary Language

Once installed, you must activate the language within your Office settings:

Open any Office app (like Word), go to File > Account > About Word , and check if you are using the 32-bit or 64-bit version. Download the Correct File: