They should've gotten Bela Lugosi to do this one as well ...
After all, at the time "Dracula" was filmed, he was not at all fluent in English and spoke his lines phonetically. One wonders why they couldn't have had him do the same in Spanish. In addition, due to the region he was from, he probably spoke some (or was even fluent in) Romanian, which of course is a Romance language, thus speaking Spanish lines wouldn't have been too much of a problem, and probably much easier than English.
I mention this only because the film overall is very good, but the Spanish-speaking Dracula is absolutely horrible and makes viewing this one rather difficult.