How to Change the Language of Microsoft Word (Display, Editing & Proofing)

Microsoft Word supports dozens of languages for everything from spell-checking to the entire interface. But "changing the language" actually means different things depending on what you want to change — and mixing those up is the most common reason people get stuck. Here's exactly how each layer works.

The Three Separate Language Settings in Word

Word treats language in three distinct ways, and each is controlled independently:

Changing one does not automatically change the others. A document can be set to French proofing while Word's interface still shows in English, and your keyboard still types in English. Understanding which layer you're targeting saves a lot of frustration.

How to Change the Editing and Proofing Language 🖊️

This is the most commonly needed change — it tells Word which language's dictionary and grammar rules to apply to your text.

In Word for Windows:

1. Open your document.
2. Select the text you want to affect (or press Ctrl + A to select all).
3. Go to the Review tab.
4. Click Language, then choose Set Proofing Language.
5. Select your language from the list and click OK.

To apply it as the default for all new documents, click the Set As Default button in that same dialog before confirming.

In Word for Mac:

1. Select your text (or all text with Cmd + A).
2. Go to Tools in the menu bar.
3. Click Language.
4. Choose your language and click OK or Default.

Key detail: The proofing language is applied at the text level, not the document level. That means different paragraphs in the same document can technically be set to different languages — useful for multilingual documents, but also the reason why pasted text sometimes uses the wrong spell-check language.

How to Change the Display Language (Interface)

The display language changes the language of Word's menus, ribbons, tooltips, and dialog boxes. This is tied to your Microsoft 365 / Office installation language, not the document itself.

For Microsoft 365 subscribers (Windows):

1. Open any Office app (Word, Excel, etc.).
2. Go to File → Options → Language.
3. Under Office Display Language, add or prioritize the language you want.
4. Click Set as Preferred.
5. Restart Word for changes to take effect.

If the language you want isn't listed, you may need to download a language accessory pack from Microsoft's website. These are free for Microsoft 365 subscribers.

For Mac users: The display language in Word for Mac follows your macOS system language. To change it, go to System Settings (or System Preferences) → General → Language & Region, add your preferred language, then restart Word.

Important: Display language packs are not always fully translated. Some languages have complete translations; others only partially localize the interface. Microsoft's language support page lists which languages are fully versus partially supported.

How to Change the Keyboard Input Language

Word doesn't control this — your operating system does. If you're typing in a language that requires a different character set or keyboard layout, you'll need to add that input method at the OS level.

On Windows: Go to Settings → Time & Language → Language & Region and add a language. Once added, you can switch between keyboard languages using Windows key + Space.

On macOS: Go to System Settings → Keyboard → Input Sources and add the relevant keyboard layout. Switch between them using the input menu in the menu bar.

Changing Language for an Entire Document vs. Specific Text

This distinction matters more than most guides acknowledge.

• Specific selection: Highlight text → Review → Language → Set Proofing Language. Affects only what's selected.
• Entire document: Ctrl + A (select all) → same steps above. Affects all current text, but new text you type may revert depending on your default settings and paragraph styles.
• All future documents: Use the Set As Default option in the proofing language dialog.

Style-linked language settings add another layer of complexity. If your document's paragraph styles have a language embedded in them (which they often do, inherited from the template), manually changing text language may revert the next time you apply a style. To permanently fix this, the language setting should be updated within the style definition itself — accessible via Home → Styles → Modify.

When AutoDetect Causes Problems 🌐

Word includes an "Detect language automatically" feature that tries to identify the language you're typing and switch proofing accordingly. It's useful in multilingual documents but often causes erratic spell-check behavior in single-language documents with occasional foreign words or names.

To disable it: Review → Language → Set Proofing Language → uncheck "Detect language automatically".

Variables That Affect Your Specific Situation

Several factors determine exactly which steps apply and what's possible in your setup:

• Word version: Word 2016, 2019, 2021, and Microsoft 365 have slightly different menu paths and language pack availability. Older perpetual license versions may not support all languages.
• Operating system: Windows and macOS handle display language differently, especially for Office apps.
• License type: Microsoft 365 subscriptions offer broader language pack access than standalone perpetual licenses.
• Document origin: A document created in another language may have language settings baked into its styles and template, which can override manual changes.
• Organizational IT policy: In managed corporate environments, display language options may be locked by your IT administrator.

The steps above cover the most common scenarios, but which combination of changes you actually need — and what's available to you — depends on your version, your system, and what the document itself was created with.