Why does the grandmother in Rapsittie Street Kids talk in gibberish?

There is a scene in Rapsittie Street Kids where the grandmother of the main character would show up, but her dialogue is almost gibberish. Here is an example:

The movie had a lot of high-profile voice actors, so this was not a simple mistake. Was this an audio issue in the movie copies or was there something bigger like perhaps the actress wanted to be no part of the work? Who was the actress who voiced this character?