Changing the Language of the Microsoft 365 Administrative Portals (and no, it is NOT done in Language and Time Zone)

As the author of a blog that now includes Spanish content, I wanted to see the Microsoft 365 Admin portals in Spanish instead of English. I followed the commonly suggested steps to change the portal language and time zone, but they didn’t work. Despite my efforts to double-check the settings, the language remained unchanged. In this post, I’ll share the solution I eventually found to this frustrating issue.