Clara - Have you tried persuading him or her to do at least one translation, one dictation and a 'fill in the blanks' exercise every day from Kwiziq Spanish (or French, or even both)? … perhaps giving your visitor permission to call you a "fastidio" [if absolutely necessary] - but at the same time it will be worth mentioning the enormous advantages that will accrue from such an activity - when visiting Spain or France, plus lots of other places.