coding section C - communication

We have several residents who speak only Portuguese. They are alert and oriented and easily able to converse in their native language. However we don't always have Portuguese speaking staff available. Should we be coding "ability to understand" and "ability to be understood" as always (0) since the resident is 100% able to converse appropriately in his native language ...or usually (1) because therer is not always a portuguese speaking staff member available to speak with him?