Final answer:
The NA should use an interpreter guide or service when caring for a client who only speaks and understands a foreign language.
Step-by-step explanation:
When caring for a client who only speaks and understands a foreign language, the NA should use an interpreter guide or service to facilitate effective communication. This ensures that the client understands their care and can express any concerns or needs. Speaking slowly may not be sufficient, as comprehension may still be limited. Additionally, using gestures can help to some extent, but relying solely on gestures may lead to miscommunication and misunderstandings.
Learn more about Communication with clients who speak a foreign language