Finding primary foreign law sources can be challenging, and finding translations even more so. The research guides, including the Law Library of Congress, found in "Where to begin" often point to sources of primary law. Be aware that many legal systems do not rely on case reports to the extent common law jurisdictions do.
Start with the "LIIs" for caselaw and statutes. Many countries have Legal Information Institutes which make caselaw and statutes available on the Internet. They may be accessed through WorldLII as well as directly. As well, for cases, try the website of the court in question and for legislation, try the relevant government's website. Gazettes are the official source of legislation in some jurisdictions: see the Government Gazettes Online website.
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There are many “LIIs” (Legal Information Institutes) searchable independently or from WorldLII's main page. They are created to make legal information accessible to the public and most are free of charge. The LII sites have both primary and secondary sources and some annotations, searchable by subject or jurisdiction. CanLII is Canada's site. Popular foreign sites are: AustLII (Australia and New Zealand), BAILII (UK), Cornell LII (US), and SAFLII (Southern Africa). The extent of coverage varies from jurisdiction to jurisdiction.