Thai or Thailander Thai.
They are called Thai
People in England call soccer 'Football'.
People from Thailand are called Thai.
Generally people just call it Soccer but some people who actually play, coach or watch a high level of Soccer/Football will call it Football.
soccer
It depends on people watching or practising.Thai people enjoy watchingSoccer (11 people)BoxingMuay Thai (Thai Kick Boxing)Sepak TakrawWomen VolleyballBadmintonTennisMost Thai people enjoy playing or practisingFutsol (4 people soccer). People play it on every corner permitted.Sepak TakrawBadmintonTennis
Football
We call ourselves 'Thais' or 'Thai people', but for some people who live in Bangkok may call ourselves as 'Bangkokians'
I think they call it shuukyuu.
Soccer
Soccer