Licorice, My son had speech therapy when he was 2 also (he only had 20 words at that time) and he switched the syllables around...saying the second syllable first at times. He would say his name Noh Coh instead of Connor...and because he couldn't do a hard C it sounded like "Noggy." We still call him Noggy for a nickname and it cracks him up. I don't remember if the speech therapist specifically called it phonological processing, but it sounds very similar to your son. DS overused the "h" sound when he couldn't produce other sounds so "hotdog" sounded like ha-ho. He was in speech therapy til kindergarten, but the reversing and the substituting sounds part of his speech cleared up within a year or so. And yes, how great to be growing up trilingual!! Nan
