Letty, according to lonely planet (the worlds leading publisher of translation books):
The word gringo, used by Americans South of the border, to refer to a person from an English-Speaking country, supposedly originated in the conflict between Mexican and American soldiers on the border between the two countries. It comes directly from English, ?'green go!', green referring to the color of the military uniforms.
I don't care for the cultural excuse at all. It is traditional in some cultures to stone people to death for adultery. Barbarism is barbarism and should be treated accordingly.
I think that public humiliation is an effective tool that is too seldom used and considering the assumed low self-esteem of this type of perp, I have to assume it would be effective.
I suggest:
First Offense:
If that doesn't work we go to the advanced model for the
Second Offense:

That oughta do it.