Power Platform. Change the language in the Admin Center.
Even if the user language is set to English, the Power Platform Admin Center and Copilot Studio pages may not be displayed in English.
I couldn't find any official Microsoft documentation to change this to English.
From the comments on the post below, I found that it is affected by the browser's language settings.
Change language settings in Power platform admin center - Microsoft Community Hub
I will explain based on the Edge browser.
https://youtube.com/shorts/hlZLwBGAkKs?feature=share
Go to Settings in the Edge browser.
Add the language you want to set in the Language section -> Click the More Options button.
Click Display Microsoft Edge in this language. If it is grayed out, click Move to the top.
After restarting the browser, the display language will be changed.