If you work with Excel files created in different regions, you may encounter formula functions written in a language you do not recognize. Excel functions like SUM, VLOOKUP, and IF are localized in each language version of Microsoft 365. For example, the German version uses SUMME instead of SUM and WENN instead of IF. This creates confusion when you need to edit or audit formulas from a colleague in another country. Copilot in Microsoft 365 can translate these localized formulas back to your preferred language without manual lookup or rewriting. This article explains how to use Copilot to convert Excel formulas between languages quickly and accurately.
Key Takeaways: Using Copilot for Excel Formula Translation
- Copilot pane in Excel for Windows or web: Opens the AI assistant that can translate formula text and explain function syntax.
- Prompt with source and target language names: Specify the formula language and your preferred output language for accurate translation.
- Verify translation with Excel formula checker: Always test the translated formula in a cell before applying it to production data.
How Excel Formula Localization Works and Why It Causes Problems
Each language version of Microsoft Excel uses translated names for built-in functions. The function arguments and separator characters also differ. The English version uses a comma as the argument separator. The German version uses a semicolon. The French version uses a semicolon as well but has function names like SOMME for SUM and RECHERCHEV for VLOOKUP. This localization applies to all Excel functions, including logical functions, lookup functions, and date functions.
When you open a workbook created in another language, Excel does not automatically convert the formulas. You see the localized function names and separators. If you try to edit the formula, Excel may show a syntax error because the function name is not recognized in your language version. Manually translating each function name using online resources is slow and error-prone.
Languages That Use Different Function Names
The most commonly encountered localized Excel versions include:
- German: SUMME, WENN, SVERWEIS, MITTELWERT
- French: SOMME, SI, RECHERCHEV, MOYENNE
- Spanish: SUMA, SI, BUSCARV, PROMEDIO
- Italian: SOMMA, SE, CERCA.VERT, MEDIA
- Portuguese: SOMA, SE, PROCV, MÉDIA
Copilot can translate any of these to English or from English to any of these languages.
Steps to Translate Excel Formulas with Copilot
You need an active Microsoft 365 subscription with Copilot enabled. Copilot for Excel is available in Excel for the web, Excel for Windows version 2312 or later, and Excel for Mac. Open the workbook that contains the foreign-language formulas before you start.
- Open the Copilot pane
In Excel, go to the Home tab and click the Copilot button on the right side of the ribbon. Alternatively, press Alt + I, then C on Windows. The Copilot pane opens on the right side of the screen. - Copy the foreign-language formula
Select the cell that contains the formula you want to translate. Press Ctrl + C to copy the formula text. If the formula is long, click the formula bar and select the entire formula text before copying. - Paste the formula into the Copilot prompt
Click the text input box at the bottom of the Copilot pane. Press Ctrl + V to paste the formula. Do not include the cell reference or any surrounding text unless it is part of the formula. - Write a clear translation request
Type a prompt that specifies the source language and the target language. For example: “Translate this German formula to English.” Or: “Convert this French SOMME formula to the English equivalent.” Press Enter to submit. - Review the translated formula
Copilot returns the translated formula in the chat pane. It also explains the function names and arguments. Read the response carefully to make sure the logic matches the original. - Copy the translated formula to a cell
Select the translated formula text in the Copilot response. Press Ctrl + C. Click a blank cell in your worksheet. Press Ctrl + V to paste the formula. Press Enter to confirm. - Test the formula for errors
Check if the formula returns the expected result. If Excel shows a #NAME? error, the function name may still be localized. Repeat the process and specify the exact language version in your prompt.
If Copilot Returns an Incorrect Translation
Copilot relies on the prompt precision and the context you provide. If the translation is wrong, refine your request with more details. Include the Excel version language if you know it. For example: “This formula is from Excel 2021 German edition. Translate it to English US.” You can also ask Copilot to explain each part of the formula before translating. This gives you a chance to verify the logic.
Copilot Returns Generic Output Instead of a Formula
If Copilot describes the formula in plain text instead of returning a formula, add the instruction “Return only the Excel formula” to your prompt. This forces Copilot to output the formula syntax without additional commentary.
Copilot Does Not Recognize the Function
Some older or custom functions may not be in the Copilot knowledge base. In that case, manually look up the function name using Microsoft’s official function reference. Then ask Copilot to help you rewrite the formula using the equivalent English function.
Copilot Pro vs Copilot for Microsoft 365: Formula Translation Capabilities
| Item | Copilot Pro | Copilot for Microsoft 365 |
|---|---|---|
| Availability in Excel | Excel for web only | Excel for web, Windows, Mac, and mobile |
| Formula translation accuracy | Good for common functions | Higher accuracy with complex nested formulas |
| Context awareness | Limited to single prompt | Can reference workbook data and structure |
| Number of supported languages | 40+ Excel language versions | 40+ Excel language versions |
| Cost | $20 per user per month | $30 per user per month with Microsoft 365 E3 or E5 |
Common Mistakes When Translating Formulas with Copilot
Forgetting to Specify the Source Language
If you paste a German formula and only say “Translate this formula,” Copilot may guess the language incorrectly. Always name the source language explicitly. Write “Translate this German formula to English.”
Pasting the Cell Result Instead of the Formula
Copy the formula from the formula bar, not the cell value. The cell value is the computed result, not the formula text. Press Ctrl + ` to toggle formula view and then copy.
Using the Wrong Separator After Translation
English formulas use commas to separate arguments. German and French formulas use semicolons. After translation, check that the separator matches your regional Excel settings. If your Excel uses semicolons, ask Copilot to output the formula with semicolons.
Not Testing the Translated Formula
Always paste the translated formula into a test cell before applying it to your working data. A single wrong argument order can produce incorrect results without an error message.
Conclusion
You can now translate Excel formulas between languages using Copilot in the Excel pane. Copy the original formula, paste it into Copilot, and specify the source and target languages. Always test the translated formula in a blank cell before using it in your workbook. For complex nested formulas, ask Copilot to explain each function first and then translate step by step. This method saves time compared to manual lookup and reduces the risk of syntax errors.