For centuries there has been a movement to reform the spelling of Spanish, Italian and every other alphabetically written languages. It seeks to change the spelling so that it is more consistent, matches pronunciation better, and follows the alphabetic principle. It is natural that pronunciations gradually change and the alphabetic principle that lies behind each language become corrupted. So if we wish to keep the spelling regular, then spelling needs to be amended to account for the changes. Furthermore it would be very hopeful if we can create or adjust a more advanced and common spelling system between the family languages. For this reason this study aims to suppose a new and common alphabet system in Spanish and in Italian, which contains more advanced one sound-to-one spelling correspondence.