I can post to @wikimedia: 

Hey Subha,

Happy 14th birthday Odia Wikipedia @odiawiki https://or.wikipedia.org/s/xzj #OdiaWiki14

and

Odia Wikipedia turns 14 today, and now has more than 10,600 articles. https://or.wikipedia.org/s/xzj

Targeted to Odia speakers. 

Jeff Elder
Digital communications manager
Wikimedia Foundation

On Thu, Jun 2, 2016 at 9:41 AM, Subhashish Panigrahi <psubhashish@gmail.com> wrote:
Hi Jeff and other friends,

Odia Wikipedia is turning 14 tomorrow. It would be great if you can schedule a message (examples below) on social media channels during 8-10 pm PST today.

Twitter: @odiawiki
Facebook: Facebook.com/odiawiki (page), Facebook.com/groups/odiawiki

Twitter:
1. Happy 14th birthday Odia Wikipedia (@odiawiki)! Congrats to all the editors making this milestone: https://or.wikipedia.org/s/xzj #OdiaWiki14
(this links to the on-wiki celebratory event page)

Facebook:
Odia Wikipedia turns 14 today. This is one of the four first Indian-languages to have a Wikipedia of its own. Being dormant for over 9 years and rising with by the efforts of a handful of editors in 2011, Odia Wikipedia has over 10,600 articls. We with the project to grow bigger with more members in the community.

Thanks,
Subhashish Panigrahi
@subhapa | http://psubhashish.com/about
Read my recent Global Voices post on India's Geospatial bill; on HuffingtonPost about challenges in growing Indian-language Wikipedias (also on (the Wire); and the Hoot article Wikipedia as a tool to save dying Indian languages.