There are numerous free websites that can assist in locating Latin American primary law, as well as secondary information on Latin American legal topics.
The Due Process of Law Foundation has published four digests on Latin American national case jurisprudence:
The 2013 Digest on Indigenous People's Rights compiles and analyzes high court decisions related to indigenous rights in nine Latin American countries. The countries covered are Argentina, Bolivia, Chile, Colombia, Ecuador,Guatemala, Nicaragua, Panama, and Peru. In Spanish only.
There are numerous blogs that focus on international law, and several that focus on Latin American law generally, and others on the law of specific Latin American countries. Many of these are in Spanish. There are also sites that focus on Latin American current events and politics and regularly update their content.
The National Law Center for Inter-American Free Trade, which is affiliated with the James E. Rogers College of Law at the University of Arizona, maintains the NatLaw World Database. This database contains laws, regulations, case law, and secondary source materials related to trade and investment for countries in the Americas. Most of the materials are in Spanish, although many English translations are available. Access to the majority of the database's content is by subscription, although some free materials are available.