Languages & formats

Hezo's web app runs in twelve languages. The very first screen is already in yours: Hezo reads it from your browser, and a language button in the top right lets you pick another one before anything else is set up.

Supported languages

English, Deutsch (German), Français (French), Español (Spanish), Italiano (Italian), Português do Brasil (Brazilian Portuguese), Nederlands (Dutch), Polski (Polish), Svenska (Swedish), 简体中文 (Simplified Chinese), 日本語 (Japanese), and 한국어 (Korean).

European Portuguese falls back to the Brazilian catalog, and traditional-script Chinese falls back to Simplified - closer than English in both cases, but not a perfect match.

Where you set it

On first run, with your master key. The language showing when you create the key becomes the instance's language, together with the date format and number format that usually go with it, so every screen after that - for you and for anyone else who signs in - reads the same way. The button in the top right of the master-key screen is where you change it first. See First-run setup.

After that, in Settings -> Languages & formats, where you can also change the date and number formats on their own.

While you are signed out - at the unlock screen after a locked start, or at the sign-in screen - there is a language button in the top right, because those screens have no menu to reach Settings through. Changing the language there applies to that browser only and tells you so; sign in to change it for everyone. The one exception is the very first screen: until the master key exists there is nobody to sign in yet, so a language picked there is saved for the whole instance.

Picking a language re-renders the picker itself straight away, so you can check it reads the way you expect before you commit to it. Nothing is saved at that point: the rest of the app, and your date and number choices, change only when you press Save. Leave the screen without saving and everything stays as it was.

It is a setting for the whole instance

The language is global, not per person. Everyone using this Hezo instance sees the same language, and only an admin can change it. That matches how the rest of the instance-level settings work.

Date and number formats

Language, date format, and number format are three separate choices on the same screen, because they genuinely come apart: plenty of people want German prose with ISO dates.

Date format sets the order of the fields:

Month names always follow your language, not the date format - so a German instance on day-first dates reads "29 Jul 2026" with the German abbreviation, not the English one.

Number format sets how numbers, such as token counts, are punctuated:

This changes presentation only: the same number, written the way you are used to reading it.

Each option previews itself with a real value, so you can pick by looking rather than by decoding a pattern like DD/MM/YYYY.

What is not translated

Hezo translates its own interface. It does not translate your content or your agents' output - task titles and descriptions, agent comments, run logs, CEO chat replies, documents, and project summaries all stay in whatever language they were written in.

If you want your agents to work in a particular language, tell them so: set it in the project's custom prompt or an agent's instructions. That is a separate thing from the interface language, and deliberately so - a German-speaking operator may still want their code comments and commit messages in English.

The documentation is English-only.