at 20 months my DD is only just starting to talk more so we can understand. Untill the last month, she only said, mum, dad, up, down, hi, jess and Taa. We were trying to teach her please, shoe, bottle, juice, food, etc. She's only just mastered them and has suprised us with messy, piggy, NO!, bed, belly, feet ( and *****....oops she didn't hear that from me *L*)and some others. I was worried too, but it has started to sort itself out. She's saying two to three words together now too and is getting her point across better so tantrums are easing up a little.... I wouldn't be too worried, at 14months they're only just starting to work out sounds and I'm sure soon he'll suprise you by saying more recognisable words....