I've seen Kakashi being refered to as Copy Ninja, but lately I've seen scans refering to him as Mirror Ninja Kakashi. Are they both accepted or is one of them mistranslated?

Why is kakashi known as the copy ninja any sharingan user can do it so why just kakashi? : r/Naruto

Naruto Chapter 476: Even An Old Fox Knows a Couple of Tricks

Is Kakashi the only sharingan user who can copy jutsu? Can other sharingan users copy jutsus? - Quora

Can Kakashi still use the techniques he copied now that he doesn't have the Sharingan? - Quora

Is Kakashi the only sharingan user who can copy jutsu? Can other sharingan users copy jutsus? - Quora

Naruto Manga 464 Breakdown and Naruto Manga 465 Spoiler Discussion: Join The Dark Side Today, They Have Cookies 0_0

Is Kakashi the only sharingan user who can copy jutsu? Can other sharingan users copy jutsus? - Quora

In Naruto, how come everyone seems to know Kakashi (Kakashi, the copy ninja)? - Quora

Why is only Kakashi called the copy ninja when every Uchiha can do it (don't answer if the answer reveals spoilers)? - Quora

Naruto Manga 464 Breakdown and Naruto Manga 465 Spoiler Discussion: Join The Dark Side Today, They Have Cookies 0_0

Can Kakashi still use the techniques he copied now that he doesn't have the Sharingan? - Quora

Naruto Chapter 476: Even An Old Fox Knows a Couple of Tricks

Naruto Chapter 596 – The Copy Ninja Kakashi

Kakashi The copy Ninja : r/Naruto

Why was Kakashi called the Copy Ninja?? : r/Naruto