How to translate business PowerPoint presentations

Contents

A product launch deck needs to go to your distributor in Germany by Thursday. A sales presentation has to be ready in French and Italian before next week's trade show. Whatever the trigger, translating a PowerPoint presentation isn't like translating a page of text. The layout, the speaker notes, the charts, and the slide structure all have to survive the process too, not just the words.

Quick answer: For a one-off presentation going into a single language, Microsoft 365 Copilot's built-in translation feature is a fast, legitimate option if your team already has a Copilot licence. For presentations going into several markets, needing consistent product names and terminology, or recurring on a regular basis, a translation management system adds Glossary and Translation Memory control that Copilot doesn't have at all. Which one fits depends on your situation, covered in detail below.

Overview

What breaks when you translate a PowerPoint presentation?

Translated text is rarely the same length as the original. German and Finnish routinely run 20–30% longer than English. A headline that fit comfortably on one line can suddenly wrap onto three, push into the next text box, or overflow the slide entirely. This is the single most common technical problem in presentation translation, and it's the reason a translated deck often needs a design pass afterwards even when the translation itself is accurate.

A few other things are specific to presentations, not just text documents:

Speaker notes. If someone local to the target market is presenting the deck, the speaker notes need translating too, not just the slides. It's easy to translate the visible text and forget the notes underneath.

Charts, tables, and SmartArt. Text embedded in a chart legend, a table cell, or a SmartArt diagram is easy to miss if a tool only picks up standard text boxes.

Slide master and theme consistency. If a deck uses a consistent visual theme across dozens of slides, whatever translates the content needs to respect that structure rather than resetting formatting slide by slide.

Text baked into images. Neither Copilot nor most translation tools, including Redokun, can translate text that's part of a flattened image rather than editable text. That has to be handled separately, usually by whoever created the original graphic.

Can you translate a PowerPoint presentation with Microsoft Copilot?

Microsoft has significantly improved PowerPoint's built-in translation in the last year. The current "Translate this presentation" feature in Microsoft 365 Copilot translates an entire deck in a few clicks, rather than the old approach of translating one text box at a time.

What it does well:

Translates the whole presentation in one action, including text boxes, shapes, SmartArt, tables, speaker notes, and comments
Understands slide structure well enough to generally preserve layout
Creates a separate translated copy, so the original file is untouched

What's worth knowing before you rely on it:

It requires a Microsoft 365 Copilot licence. This isn't the free, built-in PowerPoint translator anymore — it's a paid feature, and not every team has it enabled.
One target language per action. Translating the same deck into German, French, and Italian means running the translation three separate times, with no shared terminology between the runs.
No terminology control. There's no Glossary or equivalent — nothing stops the same product name or technical term being translated differently in this quarter's deck than in last quarter's.
No reuse across projects. Every translation starts from zero. If your team already has approved translations for recurring phrases, this feature doesn't know about them.
Text in images isn't translated, same limitation most tools share.
Some users have reported the feature behaving inconsistently across different Office update channels — worth testing on a real file before relying on it for something time-sensitive.

Best for: a single presentation, going into one language, for internal or informal use, when your team already has Microsoft 365 Copilot access.

How do you translate a PowerPoint presentation with a translation management system?

For presentations going into several markets, needing consistent terminology, or recurring as part of regular sales and marketing work, a translation management system such as Redokun adds a layer Copilot doesn't have: a shared Glossary, a growing Translation Memory, and a workspace where translators can work together on the same file.

Step 1: Upload your presentation.

Sign in and upload your PPT or PPTX file. Set the source language, then select every target language you need. Redokun handles multiple languages from the same upload, rather than one language per action.

Step 2: Invite your translators.

Assign a translator, colleague, or reviewer to each target language by email. If you don't have in-house translators for every market, this is also where you'd bring in an agency or freelancer contact.

Step 3: Pre-translate the draft (optional).

Pre-translate fills in every segment using AI translation and any matching Translation Memory (if you have previously translated your documents), so translators start from a draft rather than a blank slide.

Step 4: Translate and review in the Web Editor.

Translators work through the presentation slide by slide, with the original slide shown alongside the text so they can see where each segment appears. Speaker notes are included as their own segments, so they get translated alongside the visible slide content, not forgotten. A Glossary check flags any term that doesn't match your approved terminology, and Translation Memory suggests matches from anything you've translated before.

Step 5: Download the finished file.

Once every segment is confirmed, download the translated presentation in the original PPTX format, with layout, theme, and formatting intact and ready to present.

This is the same process EMS used to grow their marketing campaign output by 300% year over year, translating recurring marketing materials across multiple markets without starting from scratch each time.

Copilot or a translation management system: which one fits?

	Microsoft 365 Copilot	Translation management system
Best for	One-off deck, one language, internal use	Recurring decks, multiple markets, consistent terminology
Cost	Requires a Microsoft 365 Copilot licence	Project Pass (one-off) or Workspace Plan (ongoing)
Multiple languages	One target language per run	All target languages from one upload
Terminology consistency	None	Glossary, enforced across every translator
Reuse of past translations	None	Translation Memory
Speaker notes	Translated	Translated
Collaboration	Single user	Multiple translators working on the same file

Neither is the wrong choice. They solve different problems. If a colleague needs a rough translation of tomorrow's internal update and your team already has Copilot, that's the faster path. If you're translating a product launch deck into eight markets and need the product names spelled the same way every time, that's what a translation management system is built for.

One deck or ongoing need? Start here

If you have one presentation right now, for a specific trade show or a one-off distributor meeting, and no ongoing translation need, Project Pass covers it: one price, 30 days, no subscription.

If presentation translation is a recurring part of your work, such as recurring sales decks, product launches across markets, or quarterly updates, a free 14-day trial of the Workspace Plan lets you try the full platform, Glossary and Translation Memory included, before committing to a subscription.

Translating other file formats too? See how to translate InDesign files or browse the wider guide to translating documents and preserving your layout.

Frequently asked questions

Can I translate a PowerPoint presentation into several languages at once?
With Copilot, no — each translation run covers one target language. With Redokun, you select every target language when you upload the file, and translators work on each language in parallel.

Does translated text overflow the slide?
It can, especially with languages that run longer than the source text. Neither Copilot nor a translation management system prevents this automatically — a quick visual check after translation is still worth doing, particularly on text-heavy slides.

Are speaker notes translated along with the slides?
Yes, in both Copilot's current translation feature and in Redokun. Speaker notes are easy to miss with older or more basic translation tools, so it's worth confirming with any tool you're considering.

Do I need PowerPoint installed to translate a presentation in Redokun?
No. Redokun works in the browser — upload the file, translate it there, and download the finished PPTX file. No PowerPoint installation or plugin required.

What about charts, tables, and SmartArt?
Text inside tables and SmartArt is generally picked up as translatable content. Text that's part of a flattened image isn't. That has to be recreated in the source file before translation.

Ready to see it on a real file? Start a 14-day free trial, no credit card required, and upload the presentation you actually need translated.

Article by

Stefano Bernardi

Stefano Bernardi is the Co-founder of Redokun. For the past 11 years, Stefano has been an active contributor to the InDesign community and the translation management industry.

His work focuses on assisting marketing managers in simplifying complex translation processes, enabling them to speed up the translation of marketing materials up to three times faster.