It makes sense that this would present a great advantage for language skill development. A left-handed child faces some special obstacles relating to directionality and ergonomics. The things in a young child's world are form constant. Directionality does not matter. The form constant rule does not apply to our symbols.
Directionality does make a huge difference.
No wonder so many little ones have trouble learning the difference between letters d, b, and p when they are limited to a visual recognition process. This brings us to the link between physical and visual that can improve recognition fluency. Decoding is limited to a visual analysis of the shape relative to its surroundings. Use the image of the letter to the right. Move your cursor to the spot where the letter starts and click that spot.