I see. Thank you for the additional information.
This appears to involve a case of reverse race/national origin discrimination since the employer should be able to decipher at least these derogatory terms that you have indicated. The proper course of action would normally involve filing a complaint with the employer's HR department in an attempt to resolve the matter internally.
If that is not possible or would be futile, then a complaint of reverse race/national origin discrimination should normally be filed with the state Fair Employment and Housing Commission.
Here is a link that provides more information on reverse discrimination claims:
It would be best for the affected employees to also retain a local employment law attorney to guide them through the process and ensure their rights are well protected.
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