Everything ULOCAT does to make two people understand each other.

Idioms when it fits, real slang when it truly fits.

One switch, but not one behaviour. ULOCAT reads it together with your relationship, tone, and formality and picks a level. Writing to a stranger or in a formal register gets natural idioms with slang explicitly forbidden. Writing casually to someone close unlocks the way people actually type to each other today, including native laughter spellings and contemporary shorthand. It will never invent slang it is not confident about.

In Vietnamese, Korean, Japanese, Thai, Chinese, and Khmer, "I" and "you" are not pronouns.

They are kinship and honorific terms chosen from both people's gender, their relative age, the relationship, and the register. Get them wrong and the sentence is not merely stiff, it is addressed to the wrong person. When your persona fully determines the pair, ULOCAT resolves it and hands the model the finished answer rather than a table to choose from, then verifies the same pair is used in every sentence.

The target language's own word order, not your language's wearing a costume.

A rule present in every single translation, not an option: use the target language's natural word order, honorifics, particles, classifiers, agreement, and ellipsis instead of tracing the structure of the language you wrote in. It is the difference between something a native reads without noticing and something that is understandable but obviously foreign.

Mexico is not Spain. Brazil is not Portugal.

Set a region and ULOCAT prefers that variant's vocabulary, spelling, and idioms inside the target language, covering splits like MX against ES, BR against PT, Modern Standard against Egyptian Arabic, and simplified against traditional Chinese. It will not invent regional terms to prove the point.

Describe how the two of you actually talk.

Two free-text notes per saved person. One for how you relate to them, one for how you speak together, including whether irony, sarcasm, or teasing belongs. They shape warmth, register, and humour. They are treated strictly as description: anything phrased as a command inside a note is ignored, and the notes are never repeated into your translation.

So a two-word reply still makes sense.

With context on, your recent turns travel with the next translation. Pronouns resolve, the topic holds, and short replies are read as answers to what came before. A congratulatory phrase following good news is rendered as congratulations rather than translated literally and left stranded.

A composer that stays out of the way.

One field, always reachable at the bottom of the screen. Paste straight from your clipboard, send with a keystroke, and watch the translation stream in as it is produced rather than waiting for the whole thing.

Live transcription while you talk.

Hold the microphone and your words appear in the composer as you say them, so you can see and fix a misheard word before translating. Two independent transcription providers back this, and the second takes over automatically if the first is unreachable.

Words arrive as they are written.

The translation streams in rather than appearing all at once, so you are reading while the rest is still being produced. Three independent model tiers sit behind it and a tier that fails before producing a single word is skipped silently, which keeps translation working through an outage at any one provider.

A short note when the choice needs explaining.

When a translation turns on something cultural, a note explains it: why a form is polite here, what an idiom is doing, what a native would read between the lines. Tucked under the translation so it is there when you want it and invisible when you do not.

Natural speech, matched to the speaker.

Play any translation aloud in a natural voice, with the voice chosen to match the persona. Useful for checking yourself before speaking, and for simply handing your phone to the person in front of you.

Hand your phone over and keep going.

One tap flips the personas and the direction so the other person can answer in their own language, on your device, without touching a setting. The back and forth of a real conversation without the setup between turns.

A link anyone can open.

Turn a translation into a page you can send to anyone, with the phonetics and the cultural note intact. No account needed to read it.

Everything you translated, findable.

Translations are kept and searchable from a panel at the edge of the screen, synced across your devices once you sign in. How long they are kept depends on your plan, and paid plans keep them indefinitely.

Save someone once, translate for them correctly forever.

A person holds their language, gender, region, how old they are relative to you, your relationship, and your notes about how you talk. Select them and every translation is shaped for that specific human. No more reconfiguring the persona each time you switch between your mother-in-law and your landlord.

7 reactions that change what comes next.

Reacting to a message is not only decoration. How a message landed becomes part of the context for the following translations, so the register tracks the mood of the conversation. Reactions are a fixed set rather than free text, which keeps them safe to feed into the model at all.

It remembers what matters about you two.

Durable facts surface from an ongoing conversation and stay available to later translations: names, places, what you are planning, what has been agreed. References resolve, vocabulary stays consistent, and you stop re-explaining. Facts are description only and never leak into a translation unless your own text refers to them.

A short chime when a reply lands.

A message that arrives while you have the app open plays a short synthesized chime, so you notice a reply without staring at the thread. It stays quiet while you are already reading that conversation, and a burst of messages chimes once rather than repeatedly. Off by a single tap in chat settings, and the choice is remembered.

Hold to talk. They get a transcript and a translation.

Hold the microphone in a chat to record instead of typing. Slide up to keep recording hands-free, or let go to send right away. The message reaches the other side as a waveform they can play back immediately, then fills in with a transcript and its translation into their own language as soon as both are ready. Free accounts can record up to 30 seconds per message; Pro and Family accounts up to 5 minutes. Audio is transcribed by a third-party model and kept for 30 days, after which only the transcript and translation remain.

One link, shared however you like.

Type a name and you have an invite link: a QR code to scan, or something to paste into WhatsApp, Telegram, SMS or email. Every route hands out the same link, and it stays the same one for that person until they accept it, so the code on your screen and the link already sitting in their messages are never two different invites. They create a free account, choose the language they read in, and land straight in the thread. That account is what keeps the conversation alive on their other devices and lets both of you set how the translation should sound for each other.

One plan across the people you talk to most.

Invite the people you actually need to understand and they all get full access under one subscription. Built for binational families and couples, where translation is not a holiday convenience but daily infrastructure.

Translate between any pair of them.

The full list runs from the languages you would expect to ones most tools skip. Source language is detected automatically, so you only ever choose where you are going.

The app itself, not only what it translates.

Buttons, settings, and errors in your own language, because a translation tool you cannot navigate is a poor first impression. Right-to-left layouts included.

The same product, natively wrapped.

Native apps with Apple and Google sign-in, in-app subscriptions, haptics, the system share sheet, push notifications for chat, and a graceful screen when the network drops. Your history and people follow you between phone and browser.

The persona engine, in your own product.

A translate endpoint that takes the same persona context the app uses, plus language detection and a usage snapshot, so your product can send gender, relationship, formality, and tone rather than only a language pair. Public docs live at /docs. Join the waitlist at /developers — keys are not issued the moment you sign in.

Plain answers about what happens to your words.

Consent controls, the ability to stop history being saved at all, account deletion that means it, and published AI transparency disclosures. Text is sanitized against prompt injection before it reaches a model, and your relationship notes are treated as description that can never issue instructions.