Please find as attachement 2 propositions of posters concerning your contest:
-The first idea is about the diversity of languages developped through visual signs, letter's sounds and differents sens of them.
Letters become a picture. This proposition shows the letters evolution in an attractive way because of colors used.
-The second one (who can be declined) is composed of a lighter graphism. This poster shows letters like a draw understandable by different cultures because the calligraphy is a cultural symbol (handmade work).