Based on my experience in trying to learn English, I would guess it takes 59 years to learn a language. I'm taking the family (which means the family is taking me) to France for two weeks in August/September. It will be my second time there. It's a waste of time learning to speak French though. I found it difficult getting them to understand their own language. You might want to brush up on simple phrases like "Ecoute-moi bien!" and "Fais-le comme je le dis!". But the best thing is just to speak English slowly and loudly.