Go to Clock, Language, and Region → Language → Add a language .
If you prefer typing phonetically (e.g., typing "amma" to get "අම්මා"), Google Input Tools is a highly effective free option. How to Install Download the Google Input Tools Sinhala sinhala tamil ime setup for windows 8.1 free download
: Type "Sinhala" or "Tamil" in the search bar. Select the desired language and click Add . Go to Clock, Language, and Region → Language
Once you have downloaded the setup file (usually ending in .exe ), follow these steps: Go to Clock
The script is identical, but the word suggestions and keyboard shortcuts may differ slightly. For most users, either is fine.
Remove unused keyboards from Control Panel → Language → Options to avoid confusion.