I too live among hispanics in my parish. I am in the small minority of non-hispanics (about 20%). About a third of us speak English only, about a third (maybe less) Spanish only and bi-lingual people are the most common. We started a few years back using Latin in Mass on Fridays and one common Holy Days to come together in a single Mass. I think the OP has a valid point, though the use of the form is not what brings unity as much as the language. We have also had a joint seminar two years back on Gregorian Chant between the two languages and have incorporated that into the Masses. As we go on, this has given me the opportunity to expand both Latin and chant into other Masses.