Foreign law is the domestic law of any country but the U.S., and it's a big, complicated world out there. Since I can't anticipate every question you might get, I'll just offer some resources for getting the patron or you (if it's a faculty question) going on foreign law research, beyond the earlier suggested starting points.
For further, individualized help, refer the patron or the faculty question to me, and I'll get back to them as soon as I can.
A few things to keep in mind:
The Foreign Law Guide (see below) is the best tool for quickly finding country- and subject-specific information, so you can't go wrong starting there. These are a few additional places I go or steer patrons toward for national law help:
We have a variety of databases for specific jurisdictions and subject areas. Below are a few that get the most use, but there are more in the e-resources list.
For a guide to the best databases for a given country, consult the NYU list and see if we have it. if we don't and a patron has a clear need, let me know and I can request a trial for Biddle or arrange for the patron to visit to a library within our cooperative consortium (NEFLLCG) that does, if they can go up to New York or down to DC.
Finding a relatively recent, reliable translation of a foreign law is going to be a challenge in most cases. Some types of law are more likely to be available than others (constitutions are most likely, business statutes are the next most likely), and some countries are better than others (Germany's Ministry of Justice is a good citizen).
Start with the Foreign Law Guide, and also check the Law Library of Congress's helpful guide to translations for certain jurisdictions. Beyond that, here are a few places that may prove most fruitful: