Another feverish idea. The Sand People are actually nice and helpful, via subtitles. They only attack Luke because he doesn’t see the hideous thing that has crawled on his shoulder while he’s looking through the macrobinoculars.

(When they almost fire on the speeder.)
Hey! I’ll bet they’re looking for that Artoo unit we saw. I’ll get his attention.

You idiot! You might shoot his eye out! We’ll follow him.

(When the take off on their Banthas.)
Hi Ho! Jumbo! Away! (Feel free to suggest a better name for the Bantha.)

(When attacking Luke.)
Hold still! That thing is poisonous! I’ll get it!

(When ransacking the speeder)
Oh wow! Is he dead?

He’s just stunned. We should call his folks. There must be a phone number in here somewhere.

(Artoo hides behind an infinite number of rocks.)
Oh no! Mushsrooms!

(Obi Wan approaches yelling like a crazy person.)
It’s that crazy old hermit who doesn’t bathe! Run for your lives!