Apple says its entire developer documentation library is now available in eight new languages: Brazilian Portuguese, French, German, Italian, Japanese, Korean, Latin American Spanish and Simplified Chinese. The company announced the change in its October 2026 Hello Developer newsletter, published October 6, alongside an all-day performance event for developers on October 29 in Cupertino.
The translations cover the whole library rather than a handful of popular pages, so framework references, guides and the newer iPhone Duo articles can all be read in the same set of languages.
The eight new documentation languages
Apple’s newsletter puts it plainly: “The entire Apple developer documentation library is now available in eight new languages.” Here is the full list, as Apple names them:
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| Language | Language code shown in Apple’s documentation data |
|---|---|
| Brazilian Portuguese | pt-BR |
| French | fr-FR |
| German | de-DE |
| Italian | it-IT |
| Japanese | ja-JP |
| Korean | ko-KR |
| Latin American Spanish | es-419 |
| Simplified Chinese | zh-CN |
The codes come from the documentation pages themselves. Recently published pages, such as the technote on moving from Multipeer Connectivity to Network framework and the new article on how Live Caller ID Lookup preserves privacy, list English plus those same eight languages as available versions.
Note the regional choices. Apple picked Brazilian Portuguese rather than European Portuguese, Latin American Spanish rather than the Spanish used in Spain, and Simplified Chinese rather than Traditional Chinese.
What it changes for developers and for app users
For developers whose first language is not English, the practical gain is reading Apple’s own explanation of an API, a privacy rule or a new device without a translation step. That matters most for fast-moving material. Apple’s newsletter lists new guides for iPhone Duo, including Designing for iPhone Duo, Preparing your app for iPhone Duo, Choosing a camera by the direction it faces, and Registering a camera capture accessory on iPhone Duo.
For people who simply use iPhone, iPad and Mac apps, the effect is indirect. Developers who can read Apple’s guidance in their own language have one less hurdle when they add new Apple features to their apps, such as layouts for iPhone Duo’s two displays.
Apple points readers to its main documentation library to browse in their language.
October 29: an all-day event on app speed and efficiency
The second item in the newsletter is a Meet with Apple event called “Boost your app’s speed and efficiency.” Apple describes it as an all-day event on October 29 in Cupertino where “you’ll discover how to identify performance opportunities, use Xcode and Instruments to gather and analyze diagnostics, and turn your data into action.”
Developers can request to join in person in Cupertino, or sign up for the livestream from anywhere. Apple’s pitch is to help developers “maximize your app’s performance and efficiency with Apple tools and technologies.”
For app users, that is the work behind apps that feel quicker and are easier on battery. The event is aimed at the developers doing it, but the results land on everyone’s iPhone, iPad and Mac.
iPhone Duo labs and workshops
The rest of the newsletter centers on iPhone Duo. Apple says app submissions for the device are open, and it scheduled a second round of iPhone Duo Group Labs, where developers could put questions to Apple engineers and designers. The two sessions were set for October 13, 6 to 7 p.m. PT, and October 15, 9 to 10 a.m. PT. Recordings of the first round are available on demand.
Apple also says iPhone Duo workshops are now available in more cities around the world, and that Figma and Sketch design kits for iPhone Duo are available from Apple Design Resources.
Other new documentation in the October edition
Beyond the iPhone Duo guides, Apple’s newsletter lists these new documentation pages and technotes:
- Analyze a Core ML model’s performance in Xcode
- Understand how Live Caller ID Lookup preserves privacy
- Integrate your music app with Apple Intelligence
- Search indexed content with natural language
- Technote: Managing Mail background traffic load
- Technote: Moving from Multipeer Connectivity to Network framework
The newsletter also points developers to the new project format in Xcode, and to new App Store creative assets for showcasing brands and seasonal content.
The full October edition is on Apple’s Hello Developer October 2026 page. For more on the Xcode project format, see our report on how Xcode 27.2 beta adds a JSON project format for Git and AI tools.
