How to Translate Subtitles into Hinglish and Regional Dialects with Gemini

Translation craft · 5 min read · Updated 21 October 2026

How to get natural Hinglish and regional-dialect subtitles from Gemini: Roman script, consistent spelling, tu/tum/aap register, glossary terms and prompts.

Ask an AI model to "translate this into Hindi" and you'll get correct, formal Hindi in Devanagari - the kind of Hindi used in news broadcasts and textbooks. For a lot of viewers, especially younger audiences watching anime, donghua and K-dramas, that isn't what they want to read. They want Hinglish: Hindi and English mixed the way people actually talk, written in Roman letters. Getting that right takes clear instructions. This guide explains what makes good Hinglish subtitles and how to get them from Gemini consistently, with notes that apply to other regional dialects too.

What Hinglish actually is

Hinglish is not a translation of English into Hindi, and it's not Hindi transliterated letter by letter. It's a living mix:

• Roman script. "Tum kahan ja rahe ho?" rather than "तुम कहाँ जा रहे हो?"
• English words where people use them. "Plan cancel ho gaya", "Ye bahut risky hai", "Tension mat lo". Nobody says the formal Hindi word for "plan" in casual speech.
• Everyday vocabulary (bolchaal). "Chal, jaldi kar" rather than the formal "Kripya shighrata karein".
• Natural rhythm. Short, punchy lines, the way friends talk - which also happens to suit subtitles, where space is limited.

The goal is a subtitle a viewer reads without noticing it's a translation.

The five decisions that make or break Hinglish

1. Script: Roman only

Decide - and tell the model - that the output must use Roman script only. Without that instruction, models often drift into Devanagari for some lines or mix scripts within a line. Mixed scripts are hard to read at subtitle speed.

2. Spelling: pick one and stick to it

Hinglish has no official spelling. "Nahi", "nahin" and "nai" are all common; so are "hai" and "hain" used loosely. Consistency matters more than the choice itself. Choose spellings for the most frequent words and list them:

A short list like this, given to the model with every batch, removes most of the visual noise from a season of subtitles.

3. Register: tu, tum or aap

Hindi encodes respect in its pronouns: tu (very close or rude), tum (familiar) and aap (respectful). English "you" doesn't say which, so the model has to infer it - and it often guesses wrong. A student talking to their teacher should use aap; two rival fighters trading insults might use tu. Tell the model about key relationships, or note characters who always speak formally.

4. What stays untranslated

Genre fans expect certain words to stay as they are. In anime and donghua, that typically includes:

• technique and power names (Jutsu, Qi, Rasengan);
• ranks and organisations (Sect, Hokage, Hunter Association);
• honorifics, if your audience prefers them (-san, senpai);
• character and place names.

Translating these into Hindi equivalents usually sounds wrong to fans. Put them in a glossary as "keep as is".

5. Tone per character

The arrogant young master, the timid sidekick and the gruff old mentor should not sound the same. Hinglish gives you a lot of room for this - slang, word choice, sentence length. Brief notes ("Kenji is sarcastic and blunt", "the Elder speaks formally") help the model keep voices distinct.

Turning decisions into instructions

Everything above becomes a short instruction block that goes with every batch. For example:

Translate into natural Hinglish for young Indian viewers. Use Roman script only - never Devanagari. Use everyday spoken vocabulary, not formal Hindi; keep common English words (plan, problem, sorry, boss) in English. Spellings: nahi, hai/hain, kya, kyun, theek hai. Keep technique names, sect names and character names exactly as in the glossary. Students speak to teachers with "aap"; rivals use "tu". Keep each line short enough to read quickly.

In SubFly you don't need to write this from scratch: the built-in Hinglish style preset follows these rules - Roman script only, everyday bolchaal vocabulary, and lore terms like Jutsu, Qi or Sect left untranslated - and you can adjust it, or save your own version in the prompt library. Add your show's names and terms to the word list and they're applied to every batch automatically.

Why batches of context matter

Hinglish depends heavily on context. Whether a line should be tum or aap, playful or angry, depends on who's speaking and what just happened. Translating line by line loses that. Gemini models handle a scene's worth of consecutive lines at once, which lets them carry the relationship and mood across the scene. Character gender information helps too, because Hindi verbs agree with the speaker's gender: "main ja raha hoon" (male) versus "main ja rahi hoon" (female). Getting that wrong is one of the most noticeable errors in Hindi subtitles, and telling the translator each character's gender fixes it.

Beyond Hinglish: other regional mixes

The same approach works for other code-mixed and regional varieties:

• Tanglish (Tamil + English), Banglish (Bengali + English), Minglish (Marathi + English) and similar mixes follow the same pattern: decide the script, the spelling of common words, the register, and what stays in English.
• Regional dialects of a language - Bhojpuri-flavoured Hindi, Hyderabadi Hindi-Urdu, or Mumbai street slang - need explicit examples. Give the model a few sample phrases in the target style; describing the dialect in the abstract works far less well than showing it.
• Formal vs informal targets. Sometimes the right answer is standard language after all - educational content, documentaries or official releases. Hinglish is a choice, not a default.

Review with a native speaker

AI gets Hinglish impressively close, but a fluent reviewer catches what it misses: a slang term that's dated, a joke that doesn't land, a spelling that slipped back to the other variant, a tum that should have been aap. Watch the episode with the subtitles once, note the problems, and feed recurring fixes back into the glossary or style instructions so the next episode starts better.

Checklist for Hinglish subtitles

1. Roman script only - stated explicitly.
2. A spelling list for the most common words.
3. Register rules for key relationships.
4. A glossary of names and terms to keep untranslated.
5. Character genders set, so verbs agree.
6. Translated in scene-sized batches with context.
7. Reviewed by a fluent viewer.

For the broader workflow, read the complete guide to translating anime subtitles, and for tone choices like honorifics, see the fansub style guide. When you're ready, try SubFly free with the Hinglish preset on one of your own episodes.