Is anyone considering taking a Legal English Course before starting the LLM? I´d like to know where I could a take one in New York!

Hi Oxala! I've been looking for that too.
I red about law summer programs that give and introduction about the american legal system and other subjects. It takes about a month.
http://llm-guide.com/article/149/summer-law-programs
Fordham also has one of three weeks:
http://law.fordham.edu/ihtml/intl-2FordhamSummer2.ihtml?id=962&w=7
Lets keep in touch.. let me know what you have found.
Good Luck! Hope I have helped.