Hello
When 'Auto-tag' is enabled, AWB adds templates with their name in English, that are redirects to templates with names in French.
It works fine, unless there is already a template with a name in French, then AWB doesn't know it is a redirection and adds another time the template.
E.g. on https://fr.wikipedia.org/w/index.php?title=Constituons%21&diff=223831698&oldid=223426986 where AWB adds {{orphan}} while {{orphelin}} is already present.
I guess it is the same behaviour with {{Underlinked}} (={{À wikifier}}), and other templates added with Auto-tag, but I don't know the list.
Also, the link in the edit summary is a red link on wp.fr (e.g. 'orphan' links to 'CAT:O', and 'underlinked' links to 'CAT:UL').