paraphrase Because employers are permitted to impose English-only rules only based on a showing of a business necessity, the EEOC has provided some guidance on this issue. Specifically, the need for (1) employees to communicate with customers, co-workers, and supervisors who only speak English; (2) employers to promote safety and enable the rapid dissemination of emergency information; (3) employers to facilitate the completion of group projects; and (4) supervisors to appropriately evaluate work performance related to customer interaction, have been used to support a showing that the rules serve a business necessity