If you come across a person who does not speak or fully understand English. Please do not yell your words and slow them down. What the fuck kind of knowledge is that? First of all they are not deaf so yelling is most certainly not going make them comprehend any better. Second of all speaking slow will just make you look like a dumbass. Don’t get mad or frustrated, they came to you for help the least you can do is attempt to help them or direct them to someone who can.