Where does “غلطی” come from?

غلطی (Urdu) comes from Urdu غلط, from Arabic غَلَط — mistake.

غلطی (Urdu): mistake; error

Definitions

Step	Language	Word	Meaning
1	Urdu	غلط	wrong; incorrect; mistaken
2	Arabic	غَلَط	mistake

غلطی — Etymology, Origin & Word History | Etymology Explorer