A big hug to your brother, and a big kick in the a** to those who criticise other for their language, if those who speak or write, do as well as they can.
It is much more important to try to undersand each other, then to try to find faults in each other....we loose focus that way, and might loose important messages
So yes...give him a message to don't bother about people who don't have the ability to understand him....or at least don't try
....and when I am on it...have a big Grandpa hug yourself .....even if I don't write English the proper way
