If you’re in a locale with multiple languages, however, you may want to switch between them. For example, if you’re based in the United States, you may wish to use Spanish as your default proofing language for presentations.

This will mean that any text you insert uses this language—you won’t need to change it manually. Likewise, you may want to change your interface language to match. You can change both of these options to use an alternative language in PowerPoint’s settings menu. To start, open PowerPoint and select File > Options.

In the “PowerPoint Options” window, select “Language” on the left.

On the right, choose a new language in the “Office Display Language” section and press the “Set As Preferred” option. This will determine the language used for menus and buttons.

Next, choose a new proofing language in the “Office Authoring Languages And Proofing” section. Press “Set As Preferred” to make it the default proofing language for PowerPoint in the future.