Commencing in October, Apple Intelligence is now accessible in American English – Expanding to more languages next year, Thai language still pending.

Apple has announced plans to update the Apple Intelligence artificial intelligence feature for users of iPhone, iPad, and Mac. The updates will roll out in the operating systems starting from October in iOS 18.1, iPadOS 18.1, and macOS Sequoia 15.1, with added capabilities coming in future updates.

Apple Intelligence will initially support only American English language usage, then expand to include Australian English, Canadian English, New Zealand English, South African English, and British English in December. Plans for supporting other languages will be added next year, including Chinese, French, Japanese, and Spanish.

The status of Apple Intelligence during the launch is still in beta, supporting only iPhone 16, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max, iPhone 15 Pro, iPhone 15 Pro Max, and iPads and Macs with M1 chips or newer models.

Source: Apple

TLDR: Apple will update its Apple Intelligence feature for iPhone, iPad, and Mac users starting in October, with added capabilities in future updates. Language support will initially focus on American English and expand to include other variations by December. The feature is currently in beta and supports specific iPhone and iPad models with M1 chips or newer.