@tolgee/format-icu

Tolgee ICU Format Plugin
The ICU Formatter Plugin for Tolgee JS integrations

Tolgee is an open-source alternative to Crowdin, Phrase, or Lokalise

What is Icu Format Plugin?

It's a plugin for Tolgee JS, which enables the rendering of messages in ICU message format. For more information about the Tolgee ICU Format plugin, visit the docs.

Quick links

• Tolgee JS SDK docs
• Tolgee Website
  • Product (Learn more about the great features)
    • Dev tools
    • Translation assistance
    • Collaboration
• Integrations (Learn how to integrate Tolgee with your favorite technology)
  • React
  • Angular
  • Vue
  • Svelte
  • Next.js
  • More...
• Tolgee platform docs

Installation

npm install @tolgee/format-icu

Usage

First, create a Tolgee instance and run it.

import { FormatIcu } from "@tolgee/format-icu";

const tolgee = Tolgee()
  .use(FormatIcu())
  .init(...)

...

Now you can use ICU format in your translations. Example:

tolgee.t('test', 'Hello, I am {name}.', { name: 'John' })
// 'Hello, I am John.'

Check our ICU format documentation to learn more.

Why to use Tolgee?

Tolgee saves a lot of time you would spend on localization tasks otherwise. It enables you to provide perfectly translated software.

Features

• All-in-one localization solution for your JS application 🙌
• Out-of-box in-context localization 🎉
• Automated screenshot generation 📷
• Translation management platform 🎈
• Open-source 🔥

Read more on the Tolgee website

Development

We welcome your PRs.

To develop the package locally:

• Clone the repository
• Install the packages in the repository root

pnpm install

• Run web or any integration development script

pnpm develop:react

or

pnpm develop:web

This runs the development suite of this monorepo for the specific integration. The changes in each dependency package are automatically built and propagated to the test application, which you can open and play within the browser.

Testing

To run Jest tests of this package, execute

npm run test

In the /packages/format-icu directory.

Contributors

Changelog

6.2.7 (2025-08-05)

Bug Fixes

• remove unnecessary regex flags (#3467) (11bee8f), closes #3466