Forensic linguistics involves three overlapping areas: 1) investigative linguistics such as authorship analysis, 2) study of written legal language including readability and interpretation, and 3) communication in legal processes like interviews and courtrooms. Investigative linguistics analyzes disputed texts using both quantitative and qualitative methods to identify idiosyncratic linguistic features and determine authorship. The study of written legal language focuses on improving comprehension through plain language reforms. Communication in legal processes examines discourse in settings like police questioning and trials.