If you have been affected by the crashing issue on your Microsoft 365 apps while spell-checking or typing a text, Microsoft has now released a workaround for you.
Many users of Microsoft 365 apps such as Excel, Outlook, Word, OneNote and PowerPoint have been affected by the error code 0xc0000005. According to Microsoft, the problem is with the language packs installed in the system. If the version is not updated, it will cause the error after updating the apps. Users encountered the issue after installing version 2407 Build 17830.20138 or higher.

Fortunately, Microsoft released some workarounds for affected users. First, they can do an online repair of the Office 365 apps. Second, they need to reinstall the problematic language pack. Lastly, uninstall older MSI versions of the language.
How to Perform a Temporary Online Repair on Microsoft 365 Apps (Workarounds)
Go to the Start button and right-click on it. Click on Installed apps. Choose the 365 apps that you want to repair and click the three-dotted button. Select Modify. Now, choose Online Repair and click the Repair button. Simply follow the rest of the instructions.
Configure Office 365 Language
Open any Microsoft 365 apps. Click the File tab and go to Options. Select Language and navigate to Office display Language. Verify if your display language is listed. Now, go to the Office authoring languages and proofing and verify if the language you want to use is listed. If the status indicates Proofing available, click on it to install the proofing tools. Relaunch the app.
Uninstall an Old Language Installation
Launch the Windows Settings and navigate to Apps. Go to Installed apps and select the old language installation. Now, uninstall the app.
Conclusion
These methods may be temporary workarounds by Microsoft, but at least they can help you troubleshoot the issue you have on hand.