“Lex causae” is a Latin term that means “law of the cause” in English. In legal contexts, it usually refers to the law that should be applied to determine the causes or legal principles that govern a particular case or situation. It can be used in various areas of law, such as contract law, tort law, and conflict of laws (private international law), to determine which jurisdiction’s laws should be applied to resolve a legal dispute. The lex causae helps determine the applicable rules and standards that will be used to assess liability, obligations, or rights arising from a specific set of circumstances.