Official is official, release is release, release and so on. Launch refers to launch, release, etc.
Example: As usual, before the official release, we conducted a few days of public testing.
As usual, we publicly tested it a few days before the official release.
English is a language of Indo-European Germanic language family, which consists of 26 letters. English letters originated from Latin letters, which originated from Greek letters, which evolved from Phoenician letters. English is the official language designated internationally and the most widely used first language in the world. It contains about 490,000 words and 300,000 technical terms. It is also the official language of the European Union, many international organizations and Commonwealth countries, and its number of native speakers ranks third in the world, second only to Chinese and Spanish.