Factually speaking, the game is called Football, so it would be inaccurate on a world wide website to call it anything else. If the game were solely for a US/Canadian audience, then calling it soccer would be justfied.
Similarly, if a global website were to refer to American Football, that would be correct......but if it were a North American website, it would be more accurate to say soccer.
It might just be semantics, but it's correct