Hello World
Translation
Everyone writes in their own language
Hello World translates a message on its way from you to the person reading it. Text, voice notes, captions and comments — in more than thirty languages, on machines we run ourselves.
Two languages, one conversation
Each chat remembers the language you write in and the language you read in. Nobody switches, nobody copies anything into a translator, and a group where four people speak four languages simply works — each person reads all of it in theirs.
- The original is always there. Tap a message to see exactly what was written.
- You are told how sure it is. A translation carries its confidence rather than pretending to be the truth.
- Nothing is retranslated twice. Translations are cached, so a conversation stays quick.
- Aïssatoufr → youwrites in French
- Mariamawo → youwrites in Wolof
- Ousmanees → youwrites in Spanish
- Youall → enread in English
Voice notes, in writing and out loud
Record in your language and send it as you always would. The person receiving it reads the transcript in theirs and hears it read aloud by their own iPhone . Your actual recording travels with it, so they hear your voice as well as the words.
What you said becomes text on your own phone: Hello World requires on-device speech recognition rather than sending your audio to Apple.
Spoken playback exists for the languages the phone has voices for . In the others the translation arrives as text.
It learns the way your family talks
Correct a translation once and it stays corrected, for everything you read and send from then on. Add the words that matter to you — names, places, the phrases your family uses — to My Words, and they are left alone instead of being translated into something else.
This is yours: your corrections shape what you read, not what anybody else sees. You can remove a word, or tell Hello World to forget everything it has learned from you, in Settings › Translation.
Said plainly
What translating on a server means
The models run on machines we rent and operate in France, not at an advertising company — and no feature sends your messages to an outside AI company to train anything.
Encrypted on the way, readable where it is translated
Translating a message requires reading it, and that happens on our server rather than on your phone. It travels encrypted to us and encrypted onward to the people you write to; the server decrypts it in between. That is the trade: it is not end-to-end encryption, and we say so rather than let the word “private” do work it has not earned.
No person at Hello World reads your messages
There is no automated scanning for advertising or moderation, and nobody browses conversations. The exceptions are the ones you would expect: what somebody reports to us, and what a person chooses to send us themselves. What protects your messages.
Say it once. Everyone reads it.
Hello World is built for the group chat where nobody shares a language — and for the two people in it who have been meeting halfway for years.