You can switch sides if you played under 21 football for one country and can play senior football for Another Country (but you must be a national). So you can but at a different level.
About 252 countries play soccer. So..yeah..all the European countries and North America.
A lot of countries play soccer but not necessarily all.
207 countries play soccer
brazil
As it is a very popular sport all countries in the world play soccer.
One popular sport that Spanish speaking countries play is soccer. Soccer is more popular in those countries than in the United States.
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Papua New Guinea
Officially 206 countries play competitive soccer in the world
All but poorer nations play with different balls
It could be Brazil or England.