Arabs are unified by a language common to all, Arabic, a Semitic language related to Hebrew and Aramaic. The Semitic language family belongs to the Afro-Asiatic family of languages. This family included the languages of ancient Babylon, Palestine Assyria and Egypt. By the 11th century, Arabic became the common medium of expression from China to France. The Muslim Arab civilization flourished in the Arabian Peninsula and also became the language of art, science, and technology. There are some unknown & very interesting facts about Arabic Language. Countries it is spoken in includes - Afghanistan, Egypt, Eritrea, Iran, Iraq, Israel, Jordan, Kenya, Kuwait, Algeria, Lebanon, Libya, Mali, Mauritania, Morocco, Niger, Oman, Palestinian West Bank & Gaza, Qatar, Saudi Arabia, Somalia, Bahrain, Sudan, Syria, Tajikistan, Tanzania, Tunisia, Turkey, UAE, Uzbekistan and Yemen. Arabic script reads from right to left and its alphabet contains 28 characters. Words are written horizontally from right to left. Numerals on the other hand are written from left to right. The number 4, 5, 6, 7 have various forms in the languages of Iran, Pakistan, and India. It has complex text language, because it has script which is bidirectional. It is written right to left, apart from numbers and Latin words are written left to right. Many letters depending on whether they appear alone, at the start, middle or end of the word, change their form. Letters that change form are always joined in both hand-written and printed Arabic. Hence, as in the English hand writing, it is cursive. Unlike many other alphabetic scripts, it denotes a high phonetic correctness, when diacritics are added.