Should people typing in nation chat, type in the language of the nation, i.e Spanish Nation Chat, be held in the language of that nation i.e. Spanish? I say yes, it's only good manners and google translate is a click or two away.
When you have depleted his centre armour he is sinking, slow down and get behind him until he sinks then get by his side and the x should appear, don't get too close before he has sunk or you may get into a boarding action you don't want.