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?

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

Why do they call Kakashi the Copy Ninja? - Quora

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

Kakashi The copy Ninja : r/Naruto

Considering Kakashi was known as the copy cat ninja, why didn't he copy things like Tsukuyomi? - Quora

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

Samaa Samir (Kakashi) — Kakashi is the most underrated character in Naruto

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

Kakashi The copy Ninja : r/Naruto

After Kakashi lost his sharingan, can he still use the 1000 techniques he copied? - Quora

If Kakashi is “the copy cat ninja” because he possessed one Sharingan, why aren't all Uchihas considered 'copy cat ninjas'? - Quora