The terminology used to describe various groups changes over time and many terms that were common in the past have fallen out of use. The terminology may also differ between communities and countries. The following style guides can help you understand which terms to use in your writing:
A resource combining definitions and information on how to cover the multicultural world with accuracy, authority and sensitivity. Created by the Center for Integration and Improvement of Journalism at San Francisco State University.
A collection of guides, definitions and news about conscious language for our diverse population. You can search for terms and opinions by your interest area.
The Austin Community College (Texas) subject guide Dimensions of Diversity: Research has a list of potential search terms with a North American emphasis.