If you’re calling the /name-translation endpoint, chances are that some combination of your parameters is wrong for our name processing system. Some of these are coming through as 500’s in Rosette. If in this case you're trying to specify a targetScheme, you must also specify the request parameter sourceLanguageOfUse with the correct three-letter code to fix this error. We have some very advanced options for names in our SDKs, so ask us about those if you’re interested in more advanced names capabilities.