The big three subscription databases provide limited resources for foreign law. In general, they cater to business clients, so tax, corporate and business law will be covered by secondary sources. Westlaw has a small collections of statutes and cases from English-speaking commonwealth countries.
Currently, Westlaw has the best foreign law coverage of the three databases. Most are practice-oriented.
From Westlaw's home page, select Practical Law to locate the following foreign law resources:
For links to Foreign primary and secondary material:
Lexis provides good international news coverage for all countries and some primary source coverage for a few countries.
Search by legal topic or law review articles:
Bloomberg Law also has the series Getting the Deal Through