Misleading Fabric Content

Hi all,

Not sure if this is the correct place to post, please correct me if it isn't. I recently bought a skirt from American Eagle where the website states it was made from cotton + linen. Upon receiving the skirt, I saw the tag has an additional line in Spanish (see photo) where it says the exterior fabric is cotton + linen but the lining is polyester.

My question is, was this just an oversight? Is this common?

Thanks so much!