How to Set Australian English Proofing Language in OneNote for Mac
Question details
The user needs to configure OneNote for Mac to perform spelling corrections using Australian English instead of defaulting to American English.

- Product
- Microsoft OneNote for Mac
- Device & OS
- macOS
- Scenario
- Typing and spell checking notes in OneNote for Mac where local spelling conventions are required.
- Observed behavior
- OneNote defaults to American English for spelling corrections even when the macOS system language is set to Australian English, because it prioritizes the active keyboard input source over system preferences.
Ensure your macOS is updated to the latest version and verify that your system preferences allow for adding new keyboard layouts.
Set Australian English as the Active Mac Input Source
By adding and switching to the Australian English keyboard input source in macOS, OneNote will automatically adapt its proofing language to match the active keyboard.
OneNote for Mac does not offer a universal 'set as default' proofing language button that applies to all future sessions or notebooks. Instead, the application dynamically ties its spell checker to the active keyboard input language setting of your Mac.
Click the Apple logo in the top-left corner of your screen and select 'System Settings' (or 'System Preferences' on older macOS versions).
Scroll down the left sidebar and click on 'Keyboard'. Locate the 'Text Input' section and click 'Edit' next to 'Input Sources'.
Click the '+' button at the bottom left of the window, search for 'Australian', select the Australian English keyboard layout, and click 'Add'.
Open your OneNote application. Before or while typing, switch to the Australian English input source using the input menu in your Mac's top menu bar, or by pressing the 'Fn' (Globe) key.

Experience Hassle-Free Spell Checking with WPS Office
Tired of complicated and non-permanent proofing language settings in Microsoft Office apps on Mac? Try WPS Office. It provides an intuitive, lightweight, and completely free alternative with built-in spell check features that easily adapt to your preferred language, ensuring perfect documents every time.
- 1. Download and Install: Get the WPS Office for Mac installer from the official website and complete the quick installation process.
- 2. Open a Document: Launch WPS Office and create a new document in WPS Writer to begin typing.
- 3. Set Spell Check Language: Navigate to the 'Review' tab, click on 'Spell Check', and choose 'Set Language' to permanently select your preferred English dialect for the document.

Frequently Asked Questions
Why does OneNote for Mac keep changing my spell check back to American English?
OneNote for Mac dynamically links its proofing language to your Mac's active keyboard input source rather than a global application setting. If your Mac switches input sources or you have American English prioritized as a secondary keyboard, OneNote will revert to it.
Can I permanently set a default proofing language in OneNote for Mac?
No, OneNote for Mac currently does not feature a universal 'Set as Default' button for proofing languages across all notebooks. You must rely on manually changing or forcing your Mac's active keyboard input source to your desired language.
Does this input source issue affect OneNote on Windows too?
Yes, this behavior is not specific to Mac. OneNote on Windows also prioritizes the active Windows keyboard language setting over the general display language when performing spell checks.
How can I quickly toggle between input languages on my Mac while using OneNote?
You can quickly switch input languages by pressing the 'Fn' (Globe) key on newer Mac keyboards, or by using the 'Control + Space' keyboard shortcut, depending on how your macOS System Settings are configured.




