In answer to your question... Yes. What you can do is to keep in mind he *IS* and they *ARE* speaking normally and try not give them too hard a time about it. Try to realize that everyone the entire world over upon hearing his voice immediately thinks lesser of him the instant they hear that lisp. That could be a factor in why he has anger, and I for one really truly understand.
I don't much care for indian language and accents either. To my ears it sounds terse and short, almost maliciously accusatory even during completely normal conversation. Of course they are merely speaking normally, so I just kinda get along with things.
Some people are able through dedication and training and practice and not giving up and trying and sorrows and angers... are able to change their speech patterns. Some people aren't and it's just the tongue that they have. The process itself is very long and very difficult. I know through bitter experience.
When I was in my kindergarten through 3rd grade years I had difficulty pronouncing my R's, S's and Z's. The school couldn't decide if I was mentally challenged or not because I sounded really weird but I did so well in class. I spent years of my life doing speech therapy instead of playing outside with the other kids, and when I did I was singled out on account of my speech. It wasn't until I started working on the Z's that it all sort of started coming natural. I consider myself very lucky. There were others there who never really improved and they tried and tried so very hard for so very long. It really wasn't fair.
