Forgiveness of sin can be said in many ways. And there is a difference between the language סליחה (forgiveness) and other ways of saying it:

The language סליחה teaches that the sin has passed as if it never was a reality at all.

On the contrary, with the words מעביר עון (removes the iniquity) – it is still in a different place; and moreover נושא עון (pardons the iniquity) – God carries it; תם עונך (The punishment of your iniquity is accomplished)⁶³⁸ – it was a reality in the past.

footnotes: ⁶³⁸ Lamentations 4:22.

But העון הנסלח is as if the sin never existed at all.

And thus, the language סליחה is never found from man to man, because a man is not able to forgive a person in such a way, as if the sin never existed.