Forensic linguistics is the application of linguistic knowledge, methods, and insights to the field of law. It involves analyzing language to help solve crimes, determine authorship of texts, or resolve legal disputes. Forensic linguists may work on cases involving linguistic evidence, such as analyzing written documents, recorded speech, or language patterns to provide expert opinions in court. They play a crucial role in areas like criminal investigations, fraud detection, and plagiarism cases by examining language to uncover valuable information or establish the authenticity of documents and communications.