“Can you fully recover from a left sided stroke?”

Recovery from a stroke depends on several factors. The severity of the stroke, baseline movement and effort during rehabilitation can all affect recovery. Think about Resilience vs. Recovery. Your friend may never go back to his/her pre-stroke state, but they should be able to learn to compensate or function with the new circumstances.

Not likely, but you can greatly improve. Speech may remain an issue and right-sided weakness.