Asking for native-speakers implies that candidates should be of a particular nationality or ethnic group and thus discriminates on grounds of race. Given that most language-communities have very pronounced regional variations, some thought must be given to what is actually required here. Most roles only require business-level competency. Some roles – e.g. teaching languages and translation roles – do require a very high level of competence in a particular language. In these cases, it is best to use the term “native-level” competence.