CJ, like most kids his age, pronounces “r” as “w.” I was investigating this a bit and found the following interesting page which lists the various phonological shifts young kids undergo as they learn to speak. A lot of these are things CJ does and which I’d never consciously noticed! (e.g. “weak syllable deletion”, in which “telephone” becomes “teffone.”) The r/w issue is called “gliding of liquids.” Did you know that people typically can’t pronounce “th” as in “thing” until they’re eight and a half years old?
This kind of thing always reminds me of a bit of comic business in The Mosquito Coast about a guy in Massachusetts with a speech impediment and a wife named Cheryl, who he calls “Shovel.” The Mosquito Coast is a great, great, great novel, by the way! Not sure everyone is aware of this.