English translation: requiring payment of royalties/royalty-free
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Explanation: In the first instance (lizenzpflichtige), it indicates that the use of images with that label require permission/licensing from the copyright holder (typically the artist/photographer, but possibly the publisher) for some or all uses, and may also require the payment of royalties. The second instance (lizenzfrei) indicates that these images are free for use without the need for a license or the payment of royalties.