Taxonomy: Duplicate term slug error message refers to the name

[Nao]

You can't create a term if there is another existing term with the same slug. The error message indicates this warning incorrectly, referring to the term "name" instead of "slug":

A term with the name provided already exists with this parent.

Problem in action:

1. Create a category name "Example" with slug "example" without any parent category.
2. Once that is saved, try creating the exact same category again.
3. "A term with the name provided already exists with this parent." error shows up.
4. Create a category name "Example" with slug "example-2".
5. No error. Category with the same name can be created, contrary to the error message in step 3.

The error message should refer to the slug not name if this is an intended behavior. If the same term name should not exist under one level, step 4 should not be allowed either (especially with Tags).

Based on the code around the diff, this looks inaccurate. Note fields => names, and the PHP comment.

See also Line 1651 | Line 1972 (trunk). Seems like expected behaviour.

Wontfix?

I think the ticket intention is to change 'name' to 'slug' in the line below the comment that says "Same name, same slug."

I was thinking should I open a new ticket for this, but lets stay here for now.

If you go to edit screen of existing term and try to edit slug (by changing it to one that is used by other term), you only get error "Item not updated" but you don't get reason why it wasn't updated.

There should be explanation as there is one when you use Quick Edit.