President Trump praised Liberia’s president for his “good English,” seemingly unaware of the fact that it’s the West African nation’s official language.

Siokin Civicus Barsi-Giah, a close friend of former Liberian president George Weah—whose son, Tim, is a member of the U.S. Men’s National Soccer Team—referenced the country’s history as a refuge for former slaves while skewering Trump’s remarks.