Silvergirl
Yes, where has this extra h come from? i.e. Shtrengh, shtrap,
shtride, etc. Most young people do it now. I absolutely hate it. It reminds me of drunken slurring. Are they being taught this at school?
Some answers to your query from my favourite website.
www.quora.com/Why-do-I-pronounce-my-S-sounds-like-SH-sounds-and-what-is-the-cause

