I'm leaning towards no, though. I think he just gets a bit flustered trying to lead the group.

Sort of wondered this myself.

Canonically, mixing up words is probably just meant to be a character trait and nothing more (and like Mongoose09 said, maybe the stress of being the leader sometimes gets to him!). It's an interesting theory though, especially as people with dyslexia do tend to be very intelligent and creative, so I'd certainly say it's a possibility.

Yes doc is dyslexic and I would say closer to the severe side. Mild dyslexics are usually not as pronounced an obvious. I am severe dyslexic myself. I can feel myself through his character. Being an artist is a side effect of this. Doc was not written in as an artist. The creators, n artist of the cartoon would know their true intentions but a more likely scenario is that the artist was not trying to say hey doc is dyslexic, but more of the idea these traits is what Docs character needed. But yes if doc was a real person he would be a dyslexic n probably be a good artist himself