CM Cell reply · Tamil · TAU-Marutham
Type in English and the Tamil appears as you go. Where English cannot tell two Tamil letters apart — ண, ந and ன, or ல, ள and ழ — the other readings appear under the field: tap one to use it. Backspace undoes one key you typed, so ku → கு backspaces to க். Switch it off to use a Tamil keyboard or a phone IME — the field is then left completely alone, and pasted Tamil is never touched.
The sub-division number, not the ward. Remembered per depot on this browser; if it should be the same for everyone, it belongs on the depot record.