There are estimated to be between 6,000 and 7,000 languages spoken worldwide by six billion people divided among 189 countries. The first form of written language is generally considered to be cuneiform script. The official language of Azerbaijan is Azeri. Sign languages emerged naturally where deaf people gathered and some indigenous populations also have sign languages. Cymraeg (Welsh) is the Celtic language spoken in Wales. Hebrew and Arabic are written from right to left.