It won't do the poor thing any favours, and won't fix any issues. If you really want to play Spanish from time to time, I'd suggest buying, locally second-hand, a modest nylon-strung guitar that plays properly, and not inflict any more suffering on this one. A quick glance at my local 'LeBonCoin' (I'm in France...) brings up a whole slew of such guitars, from 50€ upwards, that would be far better value. Just my tuppence-worth.