"According to comScore Media Metrix, 52% of online Hispanics are English dominant, 21% are Spanish
dominant, and 27% are bilingual," Farley says. "It's best to test both to see what brings in the highest conversion rate." If your target skews toward Spanish language, hire a native speaker to write
and translate your ad copy.
Test your landing pages, too. "If you test the keywords and ad copy in Spanish, make sure you send the visitor to a Spanish page and vice versa," she says.
"Part of Google's quality score for an ad, is the relevancy between the ad and the landing page." Lastly, make sure you're using the engines' geo- and demographic targeting features to hone in on both
national and local levels.