The Pope sent out his first tweet today Wednesday December 12th, a week after joining Twitter
His main account is @Pontifex which is in English but he has seven other linked Twitter accounts. The other seven have a suffix at the end for the different language versions. The German version is @Pontifex_de, and the Arabic version is @Pontifex_ar.
The tweets will be going out in Spanish, English, Italian, Portuguese, German, Polish, Arabic and French. The pope already has over a million followers on all his accounts...