Ds2 is 5. He tends to repeat the last syllables of words when he's talking. It sounds almost like an echo. For example he will say, "Mummy..y..y..y?', or "Just..ust...ust".
It's like a stammer at the end of his words. It isn't every word or all the time. Mainly when he's asking a question, so I'm assuming it's when he's thinking about things.
Does anyone have any experience of this?