Some of my favorites

Amharic - ይማርህ - May God forgive you

Makes it sound like sneezing is seen as a punishment

Kyrgyz - Ак чүч! - This may be based on an onomatopœia of the sound of a sneeze, like the English “Atchoo.”

This is basically what my autistic son does, so it made me laugh

No explanation needed for these last two

Serbian - Pis Maco - Go away kitten

Silesian - Pyrsk! - Cheers