Steps to reproduce the issue

1. Install J4 with Blog Sample Data
2. Add a Menu Item Type: Create Article to the Main Menu Blog Menu with Access of Registered.
3. Select Blog as the Category in the Options Tab for that Menu Item.
4. Go to the frontend and login (as any UG. I did it as a Super User.)
5. Click the new Menu Item you just created and add a Title and a bit of text if desired.
6. Save it.

Expected result

That the article would save.

Actual result

Error: Save failed with the following error: Field 'language' doesn't have a default value and the article will not save.

Funny thing is that no where in the Create Article tabs is there a language field to select a language from.

System information (as much as possible)

PHP 7.0.17
MySQLi 5.6.37
Caching Disabled
Gzip Disabled
Users 1
Articles 6

The site is hosted at Rochen.

Additional comments

Can anyone else duplicate this? I saw an issue with this same error reported at #17132 if that helps at all.