He is a compulsive liar and can't help but fabricate stories.
Он патологический лжец и не может не выдумывать истории.
Definitions
A compulsive liar is an individual who frequently tells lies or fabricates stories, often without a clear motive or reason, and may do so habitually or impulsively. This behavior can stem from psychological issues and may lead to significant problems in personal relationships and social interactions.
