Yes vinegar will work to remove ink from clothes.
Soak the ink stain on the clothes in some vinegar and allow it to sit for 5 or 10 minutes.
Then make a paste of cornstarch and vinegar and rub the cornstarch and vinegar paste into the ink stain and then let the paste dry before washing the clothes.
If you have a really stubborn ink stank you may need to fill a bowl with some a cup of vinegar and the rest warm water and place some baking soda into the bowl as well.
Then agitate the clothes by hand and allow the clothes to sit in the bowl of vinegar, baking soda and water overnight.