Our country does not require that you speak american to live here, unless you want to be a citizen. It does make good sense that she would have under stood the basic commands the officers gave her. For all that was said we do not know how long she has been here, or whether she is deaf, or disabled in some other manner that is not obviouse, because of her assumed old age.
I also think the un-necessary use of force in this situation, without it being a grave danger to anyone, (unknown), except the police, that it could and should have been handled in a better manner.
It is becoming more and more difficult to recognize your enemy, But a very old woman without a command of our language and not understanding those commands being given. A diffiferent approach was justified. MY Nickle!