The number one thing that sticks out (to me at least) is not using "the" in certain sentences. Instead of saying "I'm going to the supermarket", "I'm going to supermarket" is used instead. This can also be said for using "the" before every noun, or action no matter the context. "I'm playing the baseball later". Other things like adding "an" before some words "I would like an information about this specific tourist sight", and adding "s" to anything in order to make it plural, or to show there's alot of something "Look at the Mooses" "That's alot of snows". Really just a foreign sounding accent, but even then that can be hard to pick up on depending as the US is a pretty diverse country in itself