I lived in Japan when Ariana Grande got her 七輪 (shichirin) tattoo. She thought it meant 7 rings but it means charcoal grill. All of my Japanese friends brought it up to me and were laughing at it. It even made the news in Japan. I remember going to meet with a friend at a cafe and she immediately pulled up the tattoo photo and started making fun.

Counting in Japanese is honestly kind of complex and nuanced. You need an active counter word like how we say "five sheets of paper" or "two pairs of jeans". You can't just say two jeans or five papers or you will look like an idiot. It just is not how their grammar works.

Then to fix it she added 指 (yubi) or finger. 指輪 (yubiwa) is the actual word for ring but she put it under the 七 (seven/shichi) and not before the 輪 (rin/wa) like she should have. So at that point it just reads Charcoal Grill Finger. You could also translate it in the other direction as Ring, Seven, Finger but either way the whole thing is butchered.