Over several years the United States of America have been facing a continuous inflow of Spanish-speaking - Hispanic - immigrants coming first of all from the countries of Latin America. They represent the second largest minority group of the country, furthermore, their language has a significant impact on American English. Even nowadays it seems that this process is still going on. The development of Spanglish, the mixture of English and Spanish languages originate in such historical factors. Therefore, in the first part of the book I tried to approach this phenomenon from historical point of view. On the second hand, I analized the Hispanic influence on the American English dialect taking into consideration the linguistic and literary aspects. Finally, in the last part of the work the reader can investigate how English and Spanish languages interact in cases of language learning process. The analysis should be especially useful for those who intend to be deeply involved in the study and research of the history of American English.