add language select and translations
add language select and translations

BriocheBerlin/speakerinnen_liste,BriocheBerlin/speakerinnen_liste,1000miles/speakerinnen_liste,rubymonsters/speakerinnen_liste,BriocheBerlin/speakerinnen_liste,1000miles/speakerinnen_liste,rubymonsters/speakerinnen_liste,1000miles/speakerinnen_liste,rubymonsters/speakerinnen_liste