How to pronounce Jack's pinyin?

Jack belongs to English, belonging to the west Germanic branch of the Germanic family of Indo-European languages. It evolved from the language spoken by Germans who immigrated to the British Isles from Scandinavia, the Netherlands and surrounding areas such as Denmark and Germany, and spread to all parts of the world through active British colonization. Due to contact with many national languages in history, vocabulary has changed from unitary to pluralistic, grammar has changed from "more inflections" to "less inflections", and pronunciation has changed regularly.

According to the number of native English speakers, English is the official language of the most used countries, the most widely used second language in the world, and the official language of the European Union, the most international organizations and Commonwealth countries. The number of native English speakers ranks third in the world, only after Chinese and Spanish.