Comment 11 for bug 376464

Gabor,
Restricted sounds like a good compromise; you need a Ubuntu SSO Account, much like Ubuntu One, to login, and then you can suggest. You avoid the risks of rogue translations, and ensure quality while crowdsourcing.

As for Nightmonkey, it avoids doing the logic client-side, which could be demanding and works for me (it was disrupted last year, but only due to a bug in Launchpad Translations which since has been solved)
The code is at https://launchpad.net/ddtp-lp-html/trunk and I've added István to the bug.