PPT Productivity makes it easy to change language for all slides in PowerPoint. You can select to change language for all PowerPoint slides, a selection of slides or specific shapes in PowerPoint. The standard PowerPoint feature to update set language does not work for all text on all slides. The Standard PowerPoint feature excludes text in shapes, tables and slide notes when applying language changes.

PowerPoint's default spell check feature gets confused if slides from presentations prepared with other proofing languages are pasted into a presentation, or if collaborators access a presentation using versions of Office with different default languages for review.

If you see correctly spelled words flagged as incorrect by the PowerPoint spell checker (red squiggly lines beneath correctly spelled words), this is likely caused by multiple review languages in your presentation.

PPT Productivity's set language feature lets you quickly update the set language for the entire presentation. Or you can choose to update the set language only for selected slides or selected shapes. The selected slides or shapes feature is useful if you are including text from multiple languages in your Presentation.

Select the shapes/slides to change, then from the PPT Productivity top ribbon, click Set Language button. All textboxes in the selection (including any textboxes in grouped shapes) will be set to the Default Language of your presentation.

To convert all slides in a presentation to your Default Language, from the PPT Productivity top ribbon, click dropdown menu and click the 'Set all slides Language'.