Knee Surgery Shocks Family: Teen Speaks Fluent English, Forgets Dutch

• A 17-year-old boy started speaking fluent English and forgot his native Dutch after routine knee surgery.
• He also believed he was in Utah, USA, astonishing doctors, nurses, and his family.
• Doctors diagnosed this as 'Foreign Language Syndrome' (FLS), an extremely rare neurological condition with only 9 recorded cases.
• FLS involves a patient suddenly abandoning their native language for another, differing from Foreign Accent Syndrome (FAS).
• The boy regained understanding of Dutch after 18 hours and fully recovered the next day, with doctors suspecting anesthesia affected brain's language centers.

Why It Matters: Rare 'Foreign Language Syndrome' after surgery makes teen forget native tongue, speak fluent English.