has dust changed

Dust. Dust never changes.

The amount of work actually doesn’t matter (except when it does; especially the EU may consider it). The specific wordings might matter but that’s not immediately obvious. A dictionary is at least close enough to mere database that its protected status isn’t automatic. The more selective the dictionary is the more obviously it is protected since the selection process is an expression of creativity.

Fake entries are definitely used in practice, most likely because they move the dictionary from “probably protected but the court would have to decide” to “definitely protected”.

What they actually own the copyright to is the fake entries they added to the dictionary because mere collections of facts aren’t copyrightable.