To remove ink from a bag in leather, you can try using rubbing alcohol or a leather cleaner specifically designed for ink stains.
Dab the affected area gently with a cloth dampened with the cleaner, being careful not to spread the ink further. Always test any cleaning solution on a small, inconspicuous area of the bag first to ensure it doesn't cause damage.
For tough ink stains, you may need to repeat the cleaning process multiple times to fully remove the ink from the leather.