We have been having SALt for 2 years for ds and this week he learned to say thank you - previously he said na lu (he confuses y and l). He can say it perfectly now and this week I cried in the ST's office :(
He has also mastered sh (used to say s) and s (lisp). Next is ch and j. So proud of him and all the effort he has made! Hurray for NHS SALTs - ours is wonderful :)