The largest language groups are Spanish (in Texas, California, and New Mexico), French (Louisiana and Maine), German (North Dakota and South Dakota), Slavic languages (Illinois, New York, New Jersey, and Connecticut), Chinese (California, New York, Hawaii, and Massachusetts), and Korean (Hawaii, California, and New Jersey). The language data that the Census Bureau collects is vital to local agencies in determining potential language needs of school-age children, for providing voting materials in non-English languages as mandated by the Voting Rights Act, and for researchers to analyze language trends in the United States. Projections of population growth to the year 2020, based on life expectancies, fertility rates, and immigration, suggest that the gap between majority and minority ethnic groups is narrowing. This trend, plus the movement toward a global economy, points to the importance of understanding ethnic and cultural diversity. Examples of possible misunderstandings follow.