I can offer some general advice.
As a licensed psychologist, it is essential to adhere to professional ethics and standards. Telling your 14-year-old client that pronouns aren't real may be considered unprofessional and potentially harmful. Pronouns are an important aspect of language and communication, particularly when it comes to gender identity and expression.
It's crucial to approach your clients with empathy, understanding, and respect for their individual experiences and identities. If you have concerns or disagreements about a particular topic, it's essential to handle them sensitively and professionally. Instead of dismissing the significance of pronouns, consider engaging in open conversations to understand your client's perspective better.
Always remember to prioritize your clients' well-being and emotional needs, ensuring that you create a safe and supportive environment for them to explore their feelings and thoughts. If you have any doubts or concerns about the best course of action, it's a good idea to consult with other experienced professionals or your supervisor for guidance.