Last year 2014 Google ran the Translatathon for Hindi and around 20,000 people contributed in this campaign. This year Google needs our support and contribution for other regional languages in addition to Hindi. As of Dec 2015, Google Supports 90 Languages Worldwide. Among 22 official languages in India, Google currently supports the following Nine languages.
If you are passionate about any of these languages then you can start contributing the translation using the Translate Community Tool. Before contributing register for this here. Google reward the 50 most active and accurate contributors with an Android One phone. The Contest is open to all Indian residents who can speak Indian Languages. The contest runs from 16 December 2015 to 30 December 2015 midnight.
Here the badges which i received so far which i have contributed for English < => Tamil Translations.
Please take this chance to serve your regional community to use google better.