You may use Narayam for typing languages other than English in commons. Currently input methods for many languages including most of the Indian Languages available in Narayam (complete list available here).
Help page for:
Only if you are logged in with a account here you can switch this tool off by removing the checkmark ☑ in front of “<Narayam-enable-preference>” at your Preferences, section “Editing”.
The link “<narayam-menu>” on top of each page is displayed per default for every user using a language for which an input method is defined (there's a proposal to change this behaviour which may be seen as useless for some languages: bug 32997 – will eventually get fixed in the new UI).