In 1919, the U.S. Bureau of Education commissioned a Spanish-language version of “The Star Spangled Banner.” The State Department’s website also features four-separate versions of the anthem in Spanish.  http://thinkprogress.org/2006/05/02/spanish-anthem

In his book American Dynasty, Kevin Phillips notes that during Bush’s first presidential campaign, he would often sing the national anthem in Spanish. From pg. 142:  When visiting cities like Chicago, Milwaukee, or Philadelphia, in pivotal states, he would drop in at Hispanic festivals and parties, sometimes joining in singing “The Star-Spangled Banner” in Spanish, sometimes partying with a “Viva Bush” mariachi band flown in from Texas.  http://thinkprogress.org/2006/05/02/bush-sing-spanish

Bush’s highly-scripted 2001 inaugural ceremony actually featured a rendition of the national anthem sung in Spanish by Jon Secada.  From Cox News Service, 1/18/01:  The opening ceremony reflected that sentiment. A racially diverse string of famous and once famous performers entertained Bush, soon-to-be First Lady Laura Bush, Vice President-elect Richard B. Cheney and his wife, Lynne, who watched on stage from a special viewing area.  Pop star Jon Secada sang the national anthem in English and Spanish.  Apparently, Secada singing the anthem in Spanish was a regular feature of the Bush campaign. From the 8/3/00 Miami Herald:  The nominee, his wife Laura, erstwhile rival John McCain and his wife Cindy joined Bush on a platform where children sang the national anthem - in “Spanglish,” Secada explained.  http://thinkprogress.org/2006/05/02/national-anthem-sung-in-spanish-at-first-bush-inaugural/