I did the same course more recently 2 years ago they said you only need to speak like that for a couple of months and then it’s gone and you only have to speak like a robot for like 3 days they have this phase system were there is 1 to 5 phases and only the first 3 phase ( Monday to Wednesdays it changed to a 5 day course like 5 years ago) you have to speak like that