This question is open to interpret in a few ways - you could consider specific skills to hone in on, you could frame it from the perspective of your career trajectory, or you could reference your client-facing interactions. The interviewer is looking for a thoughtfully objective response, so take a bird's eye view of your experience and career as a translator when settling on a response to this question. Regardless of your response, be sure to frame it with a growth mindset. 'Improve upon' in the question implies action, so include action in your response! Share what you hope to grow in as well as how you plan to get there.