This video shows the  differences between the dialects of Spanish spoken in Spain and Latin America. It also explains that any dialect is better than other, but they are just different. There is also a standard Spanish, that is not the Spanish from Spain, but a common Spanish used in all  Spanish  countries. Also we can see in this video, how different dialects give, sounds different to some letters.

Language acquisition is a mixture of imitation and innate knowledge that all humans have, call rules of universal Grammar. This means that all languages share common aspects or rules.