This process was sometimes called linkage editing and the output known as a load module. A compiler works with what are sometimes called 3GL and higher-level languages. An assembler works on programs written using a processor's assembler language.
In general, however, when between vowels (as in exactamente) the Spanish x is pronounced like the English ks sound but softer or less explosive. When it comes before another consonant (as in expediciÃ³n), it has the s sound in some regions/countries but the soft ks sound in others.
Spanish or Tex/Mex is used through out the book Most I have been able to figure out. I haven't figured out Hey Vato!. Since I am listening and not reading I can't give a spelling. It sounds like v - short a - t - long o. It seems a little derisive.