AI in Hindi: Devanagari, Hinglish and Formal Replies

AI in Hindi is useful for writing messages, drafting business replies, translating documents and studying, and it works best when you decide three things before you prompt: the script, the level of formality and the speaker’s gender. Hindi is written in Devanagari, but many people chat in Roman letters, a style usually called Hinglish. The word for “you” has three levels, and verbs change with the gender of the speaker. An assistant that guesses any of these gives you text that is grammatical and still sounds off.

This guide explains how to write prompts for Hindi, how to get the right register, how to handle numbers, names and mixed English, and how to check a result if you do not read Devanagari. The examples use Ask Mio, and the method applies to any assistant.

What an assistant needs to know about Hindi

Hindi is an official language of India alongside English, and it is written left to right in the Devanagari script. Its relatives and neighbours share a lot of vocabulary, and everyday speech blends Hindi, English and words of Persian and Arabic origin. The Hindi article gives the background. For an assistant, the practical points are these:

• Script choice. The same sentence can be written in Devanagari or in Roman letters, and there is no single standard for the Roman version.
• Politeness is built into pronouns and verb forms. You cannot simply “make it polite” at the end.
• Verbs agree with gender. A male speaker says “main aa raha hoon”, a female speaker says “main aa rahi hoon”.
• Vocabulary ranges from everyday to formal. Heavily Sanskrit-derived words can sound stiff in a customer message, while casual words are wrong in an official letter.

Good prompts answer these questions in advance, so the assistant does not have to guess.

Devanagari or Hinglish: choose the script

Many younger users type Hindi in Roman letters on phones, for example “aap kaise hain”. That is Hinglish. It is quick to type and fine for chat, but spelling varies from person to person, so an assistant sometimes misreads a word or answers in a different spelling than you expect. Devanagari is the safer choice for anything formal, searchable or printed.

Say what you want, in plain words:

• “Reply in Devanagari Hindi.”
• “Reply in Hinglish, using Roman letters, as in a casual chat.”
• “Give the Devanagari version and a Roman transliteration under it.”

The third option helps learners and people who cannot read the script, because they can see how the sentence sounds. For public text such as a website or a shop sign, always use Devanagari. Roman-letter Hindi on a public page is harder to read and weaker for search.

The three levels of “you”

Hindi has three common words for “you”: tu (तू), tum (तुम) and aap (आप). Tu is intimate, used for very close friends, small children or in anger. Tum is familiar and friendly. Aap is respectful and neutral, and it is the right default for customers, strangers, older people and anyone senior. Verb forms change with each level.

For business, tell the assistant to use aap throughout. A frequent error in machine-written Hindi is mixing levels in a single message, for example “aap” in the greeting and “tum” later. Check this in every draft. If you cannot read the script, ask the assistant: “Which pronoun and verb level did you use? List every sentence that does not use aap.”

Adding -ji to a name (for example “Sharma-ji”) is a common way to show respect in speech and in friendly business writing. It is polite but not always appropriate in formal letters, so state which style you want.

Speaker gender and verb agreement

Because verbs agree with the speaker’s gender, the assistant needs to know who is writing. If a woman signs a message that contains male verb forms, Hindi readers notice it immediately. Include the sender’s gender in the brief, and for company messages decide whether the voice is “I” or “we”. “We” (hum) is often safer for business because the verb form can follow the plural, though gender can still matter in some forms.

Item	What to put in the prompt	What to check in the result
Script	Devanagari, Hinglish or both	No unexpected script mixing
Formality	Use aap, formal business tone	No tu or tum in a customer message
Speaker gender	Sender is a woman, or a man, or the company	Verb endings match the sender
Vocabulary level	Everyday words, avoid heavy Sanskrit terms	Words a customer would use in speech
Numbers and currency	Arabic digits, rupee sign, lakh and crore if used	Digits, commas and units consistent
Names and brands	Keep unchanged, give the spelling	Names not translated or respelled

Numbers, money and dates

India groups large numbers differently from most of the world. One hundred thousand is written 1,00,000 and is called one lakh, and ten million is 1,00,00,000, one crore. Prices in rupees often use this grouping, and Hindi business text frequently says “lakh” and “crore” in words. If your audience is Indian, ask for that style. If your audience is international, ask for standard grouping and the currency code.

Digits can be Devanagari (० १ २ ३) or Arabic (0 1 2 3). Most business documents, prices and phone numbers use Arabic digits, and that is a sensible default. Say so in the prompt. Date order is normally day, month, year. After generation, verify every number against your source, particularly when a number is converted between lakh-style and standard grouping, since a misplaced comma changes the value by a factor of ten or more.

Names, transliteration and English words

Indian names often have several Roman spellings, and the same name may be written differently on a passport, a business card and a website. An assistant cannot know which spelling a person prefers. Paste the name exactly as the person writes it and say “keep unchanged”. If you need the Devanagari spelling, ask for it and confirm it with the person, because small differences in vowel marks change how the name reads.

English words are common in everyday Hindi. Terms like “order”, “delivery”, “account” and “email” appear in ordinary sentences, often written in Devanagari. That is natural, and a message full of rare, formal Hindi replacements can sound like a government notice. Ask for “natural, everyday business Hindi, English loanwords allowed for technical terms”. If the text is for a government office or a legal context, ask for a more formal vocabulary instead.

Translating into and out of Hindi

For translation, give the assistant the document type, the audience and the tone, and mark items that must stay unchanged. Then run a back-translation: in a new message, ask for the Hindi text to be translated into English and compare it with the original. Differences show where meaning moved. Our guide to AI translation quality covers the method, and the page on non-English AI prompts explains when to prompt in the target language itself.

For marketing text, avoid word-for-word translation. A slogan that works in English often needs a rewrite in Hindi, and the assistant can offer two or three options with different tones. For contracts, medical information and official notices, use a qualified translator for the final version. If you run a website in several languages, read our guide on how to localize a website with AI, which covers more than text.

Everyday tasks for AI in Hindi

Customer messages

Paste the customer’s message in Hindi or Hinglish and ask for a short English summary first. Then ask for a reply with the facts you supply, in Devanagari, using aap, with the sender’s gender stated. Read a back-translation before sending.

Product and shop text

Ask for descriptions that sound written for Indian shoppers and use everyday words. Provide specifications, weights and prices yourself, and ask the assistant not to invent claims such as certifications or delivery times.

Study and practice

Learners can ask for short dialogues at their level, written in Devanagari with transliteration and an English gloss, then practise replying. Ask the assistant to correct mistakes and explain each correction in one sentence. For pronunciation and finer points, a teacher or a dictionary is the authority.

Documents and forms

Upload a Hindi PDF or a scanned form and ask for a summary, dates and amounts. On paid plans Mio reads PDF, Word and image files. Verify names, dates and sums against the original document.

Fonts, display and typing

If you publish Hindi text, the page needs a font that covers Devanagari, otherwise readers see empty boxes. Set the language attribute to Hindi on the text block so that browsers and screen readers handle it correctly, and test the page on a phone, where narrow columns and conjunct characters expose problems quickly. Ask the assistant to produce HTML with the language set and to keep Hindi and English words in separate spans where the font differs.

For typing, most phones have a Hindi keyboard and a transliteration keyboard that turns Roman letters into Devanagari as you type. That is often the easiest way to prompt in Hindi if you think in Hinglish: type naturally, let the keyboard convert the words, and send. If the assistant misreads a word, rewrite that word in Devanagari, since Roman spelling varies and a single ambiguous word can change the meaning of a sentence.

How Mio handles Hindi

Ask Mio runs in more than 25 languages, and Hindi is one of them. You can write in Devanagari, in Hinglish or in English, and Mio replies in the language and script you ask for. You do not pick a model, because Mio routes each request to the model it judges best for the job. Write mode is on every plan, including the free one, so you can test a reply or a translation without a card. Memory and projects, which are on paid plans, let you save your rules once: “use aap, Devanagari, Arabic digits, female sender, no heavy Sanskrit words”.

See our multilingual AI assistant guide for the wider picture, and the guide to AI in Arabic for another language with its own script and register rules.

Common mistakes

• No script instruction. You receive Hinglish when you wanted Devanagari, or the other way round.
• Mixed pronoun levels. “Aap” and “tum” appear in the same message.
• Wrong verb gender. The sender’s gender was never stated.
• Over-formal vocabulary. The text reads like an official circular.
• Unchecked numbers. Lakh and crore grouping is misread or converted incorrectly.

Frequently Asked Questions

Can I use AI in Hindi without reading Devanagari?

Yes, for drafts and understanding. Ask for the answer in Devanagari with a Roman transliteration and an English gloss, then request a back-translation to check the meaning. For public, legal or sensitive text, have a Hindi reader approve the final version, since you cannot judge tone and small errors yourself.

Should I write Hindi in Devanagari or Roman letters?

Use Devanagari for anything formal, public or searchable, such as websites, offers and official messages. Roman-letter Hindi, or Hinglish, suits quick chat but has no standard spelling and can be misread. State your choice in the prompt, or ask for both versions, so the assistant does not decide for you.

How do I make Hindi text sound polite?

Ask for the respectful pronoun aap and matching verb forms throughout, name the sender’s gender and set a formal business tone with everyday vocabulary. Then check that no tum or tu appears in the draft. If the message sounds stiff, request a warmer version with simpler words while keeping aap.

Can an assistant handle lakh and crore correctly?

It usually can, but you should verify. Tell it which style you want, Indian grouping such as 1,00,000 or standard grouping such as 100,000, and check every figure against your source. A misplaced comma changes the amount by a large factor, so numbers in contracts and invoices always need a human check.

Is AI translation into Hindi accurate enough for business?

It is accurate enough for drafts, internal notes and routine replies when you give context and check the result. It is weaker for idioms, slogans and legal wording. Use a back-translation, protect names and prices, and ask a native reader or professional translator to approve anything customers or authorities will see.

The Bottom Line

AI in Hindi works well when you set the script, the pronoun level and the speaker’s gender up front, and then check numbers, names and tone yourself. Use back-translation to catch shifts in meaning, and a Hindi reader for anything public or legal. You can try a Hindi reply on the free plan, and see paid options on the Ask Mio pricing page.