Kya thora aahista bol sakte hain? / Kya tum thora aahista bol sakte ho?

How to say “Kya thora aahista bol sakte hain” in English

When you want to say “Kya thora aahista bol sakte hain?” (or “Kya tum thora aahista bol sakte ho?”) in English, the natural, everyday way is “Could you speak a little slower, please?”. It fits polite requests.