Speaking in a different language can linguistically ostracize non-speaking coworkers. Employees disidentify with colleagues who speak a language they do not understand in their presence, and are more likely to initiate in deviant behaviors against them.

See the source article by following the link below:
Speaking in a different language can linguistically ostracize non-speaking coworkers. Employees disidentify with colleagues who speak a language they do not understand in their presence, and are more likely to initiate in deviant behaviors against them.