Complex sentence: He did not have difficulty communicating with his adoptive parents as he was fluent in English from his childhood as his biological mother was of Burgher descent; his birth father came from a Buddhist family with a long tradition in Sri Lanka.
Split into simpler sentences: He did not have difficulty in communication with his adoptive parents as he was fluent in English from his childhood as his mother had Burgher descent. His father came from a Buddhist family with a long tradition in Sri Lanka.