It is my understanding that the version of the anthem currently in circulation omits the whiny chant about mean laws and is just a straight-up Spanish translation. In fact, the translation seems to be the one composed by Francis Haffkine Snow. It was commissioned by the U.S. Bureau of Education. In 1919. And is freely available, as you can see, from that noted nest of subversion, the Library of Congress.
National Review's Mark Krikorian can, as usual, be relied upon for a non-sequitur quote:
Would the French accept people singing the La Marseillaise in English as a sign of French patriotism? Of course not.
After four years of Freedom Fries and Chilean reds, "the French wouldn't put up with this" is a rhetorical loser. Go out and find me an English speaker who is interested in singing La Marseillaise in any language. In fact, find me someone outside France who doesn't snigger at the phrase French patriotism. Let Nuestro Himno do the work of instructing its audience in the language they understand.