The original French motto Unité dans la diversité was translated in the other ten official EU languages plus Latin when it was proclaimed the motto for Europe on 4 May 2000.
The motto was translated into the 23 languages in which there were official translations of the European Constitution on 29 October 2004 European motto In varietate concordia], Eurominority(the treaty, and hence the motto, was officially translated into Bulgarian and Romanian despite the fact they would not join for a further three years. Irish was not included however but is on the list here as it became an EU language in 2007). Croatian is included since 1 July 2013.
Croatian: Lua error in Module:parameters at line 376: Parameter 1 should be a valid language or etymology language code; the value "hr" is not valid. See WT:LOL and WT:LOL/E.
Romanian: Lua error in Module:parameters at line 376: Parameter 1 should be a valid language or etymology language code; the value "ro Unitate în diversitate" is not valid. See WT:LOL and WT:LOL/E.
Croatian: Lua error in Module:parameters at line 376: Parameter 1 should be a valid language or etymology language code; the value "hr" is not valid. See WT:LOL and WT:LOL/E.