I think that you are asking a very general question that is hard to answer concisely.
Other pages of this site have general information on Taijiquan and Yang Style that might be more helpful to you than trying to describe Yang Style and Taijiquan in a few paragraphs. Many of the centers of this Association also have very comprehensive websites that provide information in many languages.
Below are some of these links that might be helpful. I am not sure that I will be able to create the links properly, but I will give it a shot. Here they are:Tai Chi InfoTai Chi Info: FormsTai Chi Info: Essays
Here are links to three centers in Brazil with information in Portuguese.www.taichichuan.com.brhttp://www.sbtcc.org.brwww.centroculturaltao.com.br
If you have questions regarding any of this information, feel free to follow up with more questions.
[This message has been edited by Audi (edited 11-25-2004).]