P214 CEEFAX 214 Sun 22 Dec 22:44/17      -,,%  The leader of Nicaragua has invited President Reagan to join him in a lie detector test to see who is telling the truth about Central America. The US has accused the leftist Saninista government of seeking to spread revolution through the region. Nicaraguan President Daniel Ortega has denied the claim. Referring to President Reagan's plan to root out spies in the US civil service bz using the detector, Mr Ortega said both leaders should undergo the test so "the world knows who is the liar". News index 102/202 Newsreel 119/219