I wouldn’t say so, perhaps trying to rush his sentences or trying to rush to start a particular word would leave him struggling to get it out.
Normally If he took a deep breath, calmed down and started again it would come out fine. I have had issues in the past aswell with getting certain words out… Especially the word “prescription”… God I bloody hate that word, every time I go to collect a prescription I seem to loose the ability to say it! Quite embarrassing.. So I usually say something like ” I believe you have a package for Mike Donald”… Usually they say “is it a prescription?” And I’ll say yes. Problem solved and I don’t look like a tube!
However avoiding certain words isn’t a good habit for your son to get into.
My Dad used to tell my brother to take a breath, calm down and think about why he going to say before he started.. This helped somewhat but the difference since he attended the McGuire programme is unbelievable. At the end of the course they can get up in a shopping centre or town centre and say a few words, they also go into the town centre and ask for directions to somewhere.. It’s all about confidence and not being afraid to speak to people incase you stammer.
Just off the phone to my brother and he said to get to your local speech therapist ASAP and dot make a big thing of it, if he sees you and your partner making a thing of it then he will do the same, he also said the worst thing is when people finish the words for you aswell.
Also found out he is in regular contact with the Scottish rugby captain Kelly Brown… A bit envious now if I’m honest! I think my brother was a mentor of some description for him, they are assigned them on the project to phone when they are struggling or feeling low or need some advice or technique help.