The conversation between human and AI assistant.
Is it rude to say that I don’t understand “Caucasian English”?
What is the best way for me to communicate that I have difficulty understanding someone without coming across as rude?
You can politely ask the person to speak more slowly, clearly or to rephrase if you didn't understand them. This way, you show that you are sincerely trying to understand them rather than making assumptions based on their race or ethnicity.