I can't type Sinhala or Tamil language in Ubuntu 15.10 except LKLUG. I want to type Sinhala language as well as English (UK).
Click install/remove languages button
check the required languages
click Apply changes
give authentication for downloading and wait for installation
then goto system settings and Click on Text entry Settings
press "+" button add required languges from the list
then click on the keyboard indicator and select language for typing