Azerbaijani is the official language of the Republic of Azerbaijan and is spoken by 30 million people in the world, although the population of Azerbaijan is only 9 million.
The Arabic alphabet was introduced to Azerbaijan in the 7th century and used until the 1920s. In 1929, the Latin alphabet was introduced in Northern Azerbaijan in an attempt to avoid the influence of Islam. Then the Cyrillic alphabet was adopted in 1939. In 1991 they switched back to the Latin alphabet once again, but a slightly different version from the one used in 1929. These switches obviously caused considerable confusion!
To this day, the Latin alphabet is used in Azerbaijan.