Mis-pronunciation of words

Those with autism often struggle to pronounce words (or regularly mispronounce them)  What is this called?  

Parents Reply Children
  • In their own region, but the glottal stop stops being part of a local accent when it is used, not in Wapping but in Doncaster or Ipswich. I like dialects, I know what, "Hoo's sufferin' from th'edwarch" and Ah've etten mi baggin in't shippon, past yon ginnel" mean.