For those wondering, this is still the nominative, but a long final -ii sound invariably gets replaced by a kasrah nunation, regardless of the nominal case.
I thought the accusative case still had final ـيا? So أشتري بيبا غاليا, not بيتا غال, right?
Idk غال، غالی، غالِ، غالِِ
Arabic is very hard :(
Wish this type of lessons had audio, would help alot