You yourself demonstrate a lack of education. Monks choose Sak Yant for individuals that do not understand the Thai language (commonly westerners) and it is not the common course of action. Also unless you abide by the Sak Yant rules of conduct the symbol has little meaning as it is considered to be of sacred magical significance. The individuality of each piece also makes it difficult for another to infer its meaning, educated or otherwise, as the monks have their own traditions and pass their knowledge down through the generations.