Thread:Project:Support desk/How to force lowercase (small letters) titles

How do I force new articles to be titled with only small letters (except the default initial capital letter)? Is there an extension to keep writers uning only capital letters in title names? Like the opposite of $wgCapitalLinks, forcing the rest of the title to be all lowercase.

Having external systems linking to articles often result in articles not found because some writers only use small letters, some only capical letters and some even a mix.