Foreign law is law that applies inside another state. For more on this concept read the Foreign Law entry from Black's Law Dictionary and Chapter 3 in the nutshell on International Legal Research.
In print the library has a fairly good collection of Mexico's codes in Spanish as well as statutes and case reporters from the UK. However, not all of these are still updated.
After reading this guide do you still have questions about Foreign Law research?
Below is a list of every electronic resource on the list of selected research databases that is tagged as having to do with foreign & International law.
The "International" tab on the main screen has access to foreign law materials. You may search in sources for "treaties" to find other materials as well. Lexis has slightly better coverage of foreign jurisdictions than Westlaw, with the exception of the UK.
There is access to some international law and foreign law materials on Westlaw as discussed above. However, Westlaw categorize them all as "international materials." It is up to the user to determine which deal with international law and which with foreign law.
This guide was created in February 2021 from the "International, Foreign & Comparative Legal Research" guide that had been created by Bobbi Weaver in September 2010. The older guide is no longer updated, but it remains available at the above link for its wider scope and its inclusion of resources available at other libraries in San Diego.
This guide was last updated by Bobbi Weaver and Robert O'Leary in February 2021.