This study mainly evaluates the key role of the non-verbal cues in the cross-cultural business negotiations and highlight their significance to overcome all the language barriers. The study undertakes a secondary qualitative method and a thematic analysis that explores the way that non-verbal communication impacts the negotiation outcomes and providing effective information to improve interaction in different professional settings.collaboration without exchanging training information. FL protects diversified applications from sensitive data leakage through mechanics including differential privacy and homomorphic encryption and secure multi-party computation which meet privacy legislation. FL serves diverse healthcare and financial sectors as well as IoT operations alongside edge computing applications because it keeps sensitive information within individual devices. As much as FL provides benefits its implementation faces three main challenges related to communication overhead and non-IID data distributions together with security vulnerabilities.