Okay, let’s calculate this. So Stephen has native English, which is a plus. He also has professional working proficiency in German, which is valuable. Limited Mandarin proficiency is less valuable, but still useful. Location is Chicago, which is a major hub. For an international professional with his language skills, I’d estimate around $75 per hour, considering the lower end of the industry scale for language skills. This is a rough estimate, and actual rates may vary widely depending on the industry, company, and specific job requirements.