Half of India's business happens on WhatsApp, and most of it happens in Hinglish. "Sir, order kab tak aayega?" — you can't reply to that in Queen's English and you can't reply to it in pure Hindi either. And every AI tool I've tried defaults to sounding like a British newsreader.
After a lot of trial and error, here are the prompts and settings that make AI write natural Hinglish — for WhatsApp replies, Instagram captions and customer emails — without sounding like a Bollywood dialogue.
Rule 1: give it your own examples
AI copies the style it sees. So the single most powerful thing you can do is paste three of your real messages first:
Here are three messages I've sent customers. Match this tone and mix of Hindi/English exactly.
- "Hi Priya ji, order dispatch ho gaya hai 😊 tracking link kal tak aa jayega."
- "Sorry for the delay sir, courier ki taraf se issue tha. Aaj shaam tak deliver ho jayega."
- "Thank you so much! Agar koi aur help chahiye toh bataiye." Now write a reply to a customer asking why their refund is taking 7 days.
Claude is especially good at this — it picks up the level of Hindi, the "ji", the emoji, and stays there.
Rule 2: say the ratio out loud
"Hinglish" means different things to different people. Be specific:
Write in Hinglish — about 70% Hindi words in Roman script, 30% English. Keep technical words (refund, tracking, order ID) in English. No pure Hindi sentences.
That one line fixes 80% of weird outputs.
Rule 3: name the platform and the length
WhatsApp is short. Instagram is punchy. Email is polite. Tell it:
Format: WhatsApp reply, maximum 3 lines, one emoji, no signature.
or
Format: Instagram caption, 2 lines + 5 hashtags, first line should stop the scroll.
Prompts I actually use (copy these)
Angry customer, late delivery
Customer message: "Kya yaar, 5 din ho gaye order nahi aaya. Cancel karo." Reply in friendly Hinglish (60/40 Hindi/English), apologise once, give a concrete update, offer a small goodwill gesture (₹100 store credit), and end warmly. WhatsApp format.
Festive offer post
Write 3 Instagram caption options for a Diwali sale on ethnic kurtis, 20% off till Sunday. Hinglish, playful, one line each, plus 5 hashtags. Avoid clichés like "dhamaka".
Reply to a 1-star review
Draft a public reply to a 1-star Google review that says the food was cold. Hinglish is fine but keep it respectful and mostly English since it's public. Apologise, don't argue, invite them back.
Follow-up to a lead
Write a soft follow-up WhatsApp to a lead who asked for a quotation 3 days ago and went silent. Hinglish, 2–3 lines, not pushy.
Which model does Hinglish best?
From my testing: Claude for tone and restraint, Gemini a close second and better when the caption needs a current reference (a cricket match, a trending sound), Llama/Nova perfectly fine for volume — fifty captions for a catalogue — and much cheaper. In Kryotta I run the first prompt through two models side by side, pick the tone I like, and let Auto handle the rest of the day.
The mistakes that make it sound fake
- Too many Bollywood words ("dhamaka", "jhakaas") — real customers don't talk like trailers.
- Mixing scripts (Devanagari + Roman in one message) unless you actually do that.
- Long messages. Hinglish is a spoken register; keep it short.
- Forgetting "ji" / "sir" / "ma'am" where your customers expect respect.
Save the three-example prompt as a template and you'll never start from a blank box again.
