I would assume he has a team of people managing his social media, including tweets. I would further assume that on that staff is a proofreader, which should tell us how important misspellings are.
Soccer is called football in other parts of the world.
The nuclear football is a briefcase, the contents of which are to be used by the President of the United States to authorize a nuclear attack while away from fixed command centers, such as the White House Situation Room.
https://en.wikipedia.org/wiki/Nuclear_football