Is microsoft Word for Mac 2011 compatible with OS Mojave

I would say that no security updates, no support, not tested, and no technical updates, make it not compatible, at least that's the way I see it. If you see it differently so be it.

"Word, Excel, PowerPoint, Outlook and Lync for Office for Mac 2011 have not been tested on macOS 10.14 Mojave, and no support for this configuration will be provided. This means there will be no new security updates, non-security updates, free or paid assisted support options, or technical content updates. Refer to the Microsoft Support Lifecycle for more information."

https://support.office.com/en-us/article/support-has-ended-for-office-for-mac-2011-559b72b1-e045-4c73-bad3-d7f1841b9e8c

Judge for yourself, it works for people I know:

Yes, it works with Mojave, but is no longer supported by Microsoft. 8 years is a long time to continue support.

No.

Microsoft Office / Mojave Compatibility