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New ways to customize how Copilot edits your workbooks

Sam Radakovitz's avatar
Sam Radakovitz
Icon for Microsoft rankMicrosoft
Jun 16, 2026

Personalization and workbook rules introduce new ways to set rules for Copilot in Excel

If you’ve ever typed the same formatting and style instructions into your Copilot prompt every single time - don’t merge cells,” “use my header style,” “name the tables this way”- we built two new fe...
Updated Jun 15, 2026
Version 1.0
copilot in excel
excel
MarekBernolak's avatar
MarekBernolak
Copper Contributor
Oct 29, 2026

Hi,

In Polish version of Excel Copilot creates worksheet called .Reguły (.Rules in Polish). 

What if I change language to English? I change language in Excel a lot.

Will Copilot still check .Reguły? Should I use English worksheet name only? (.Rules)

Thank you in advance