The statutes enforced by OSHA are listed in the Summary Chart linked here. They contain whistleblower (anti-retaliation) provisions that generally provide that employers may not discharge or retaliate against an employee because the employee has filed a complaint or otherwise exercised other rights provided to employees under the statute. Each law requires that complaints be filed within a certain number of days after the alleged retaliation. Complaints may be filed orally or in writing, and OSHA will accept the complaint in any language.