A graphic designer, Moshik Nadev, is suing Cher for jacking his famous typeface and using it all over her 2013 album, "Closer to the Truth."

Moshik Nadev says he created the font, Paris Logo, back in 2011 and this font earned him praise on a load of graphic design websites, including Vogue.

Nadev says his famous font and the font on Cher's album are indistinguishable ... in thickness of the swishes and lettering which, gotta say, they look super similar.

Nadev says he contacted Cher and her label and graphic designers to fork over the materials they used to create their logo, but they've refused to pay and continue to sell the album.

He's suing for more than $5 million in damages.

TMZ tried to reach out to Cher for comment ... so far, no word back.