The Law Library has a good collection of treatises about comparative criminal law, addressing the laws of various countries. These works are not translations of foreign domestic laws, rather, they are analysis of the criminal procedure laws of various countries. Print treatises are best located by searching in an online library catalog.
Here is a partial list of relevant subject headings:
Criminal Procedure (followed by name of jurisdiction)
Terrorism -- Prevention -- Law and Legislation (followed by name of jurisdiction)
There are very few online treatises that you can use when studying criminal procedure laws of foreign countries.
These treatises address the topic of comparative criminal law in the context of a variety of different issues across several jurisdictions. This list is not exhaustive, but is meant to serve as a starting point for your research.