Because they're worth it: the protection of slogans

A good slogan is a concise and striking phrase that aims to summarize
the quality of a product or service. As with memorable trademarks, good slogans
can be significant elements of identification. This makes them very valuable
and thus vulnerable to abuse. Audrey Yayon-Dauvet and Isabelle Leroux at Bird
& Bird in Paris look at the French example, which provides protection for
slogans under trademark, copyright and unfair competition law, to see how slogans
can be safeguarded against fraudulent use.