I want to teach English as a second language in another country but I'm Asian. Will I be accepted?

Well, if you can speak english fluently and gain good grades in english it wouldn't matter if you were asian african or marsian as long as you are able to teach the english language, and of course, its advisable that you have a knowledge of other languages too...You said you want to work in a spanish speaking country...and you been tutouring spanish speakers online, if they think your muy bien then go for it! if you know some spanish already, its a good idea to boost your knowledge of the Spanish language, and it helps being exposed in a spanish speaking country, like that you are able to teach english in exchange of learning spanish..those chinese who wanted only white-faced english speakers failed to realise that its not only white people who are fluent in english...search for a job their in a spanish speaking country and give it a try, I'm sure there are employers there who will need you :)