As a general rule, these laws do not apply to foreign corporations unless a U.S. firm controls the foreign corporation. And even then their applicability is not guaranteed. In general, these laws are only applicable so long as certain conditions are met. The required conditions can generally be summarized into four "guidelines":
- Location of the work
- Employer status (including home country)
- Employee status (US citizen, resident, etc.)
- International law defenses
Before one can begin investigating whether or not the scope of U.S. employment discrimination laws apply in an international setting, one must first understand the nature of the job as it applies to the above-listed four categories. To do this, one will require professional translation services. For example, to understand the status of the employer and employee, along with the particularities of applicable foreign laws and international treaties, one needs to obtain a professional English language translation of all the pertinent foreign-language documents.
For additional information see: http://www.krannert.purdue.edu/centers/CIBER/publications/pdf/Campion%20Paper.pdf