Between AD 409 and AD 711, as the Roman Empire collapsed in Western Europe, the Iberian Peninsula was conquered by Germanic peoples of the Migration Period. The occupiers, mainly Suebi, Visigoths and Buri who originally spoke Germanic languages, quickly adopted late Roman culture and the Vulgar Latin dialects of the peninsula and over the next 300 years totally integrated into the local populations. Some Germanic words from that period are part of the Portuguese lexicon. After the Moorish invasion beginning in 711, Arabic became the administrative and common language in the conquered regions, but most of the remaining Christian population continued to speak a form of Romance commonly known as Mozarabic, which lasted three centuries longer in Spain. Like other Neo-Latin and European languages, Portuguese has adopted a significant number of loanwords from Greek, mainly in technical and scientific terminology. These borrowings occurred via Latin, and later during the Middle Ages and the Renaissance.