lallation /lə-LAY-shən/. noun. Baby talk; gibberish. Also, confusion of the R sound with the L sound (AKA lambdacism).
“Disorders of articulation include lisping, lallation, substitution of sounds, omission of sounds, and addition and distortion of sounds.” (S. S. Chauhan)
“Lallation is sound separated from meaning, but nonetheless, as we know, not separated from the infant’s state of satisfaction.” (Colette Soler)
“Lallation it’s called, the difficulty Asians have in pronouncing ‘L’ and ‘R’ in English. For years it prompted adolescent jokes about ‘flied lice’ and ‘I went to U.C.R.A.’ The wisecracks have waned as Japan has given America lessons in quality and industry. No one is heard to mock the Honda Acula or the Sony Warkman.” (New York Times)