When I lived in Atlanta, I knew a good priest from Ireland (in Atlanta) as well as a good priest from Columbia.
Getting priests from other countries is happening across the country.
I don't know if the Philippines has a surplus of priests.
Getting a Spanish speaking priest in that part of the country may be a plus. The English of such priests may be questionable.
But would one rather have a good priest with questionable English or a bad priest with good English?
There are problems with bringing priests in - work visas, and perhaps a cost factor.
Your brother may know this better than anyone.
Helping to serve the Hispanic population may be a greater need -- without knowing the exact situations...
A Spanish-speaking priest could always say Latin masses, though, and I think there are those from Latin America who like the Latin Rite.