We checked on whether or not any such instructions had been given to employees recently. It is possible that someone did that at some point in time, but it in no way reflects Service Canada policy.
Employees who are able to speak a second language obviously have the right to do so, out of courtesy to the employees. However, we also require that in a unilingual Service Canada centre, that they immediately indicate to people who arrive and speak the other official language that if they wish to have access to bilingual service, it is available by telephone or in another centre.