Final answer:
The teams qualified for World Cup 2018 included 32 nations like Brazil, Germany, Argentina, and France, who won the tournament. The qualifiers are determined through a separate process for every World Cup iteration.
Step-by-step explanation:
The question 'Who has qualified for the World Cup 2018?' pertains to the event which took place after the 2010 World Cup. The 2018 FIFA World Cup saw 32 teams qualifying to participate in the tournament held in Russia. While you have mentioned the 2010 World Cup hosted by South Africa, it's important to note that the qualifying teams would have been different for the 2018 event due to the separate qualification process for each World Cup. In 2018, some of the teams that qualified included powerhouses like Brazil, Germany, Argentina, and the eventual champions, France.