Crowdin

This extension serves to support both backend and frontend translation. This extensions integrates the in-context editing of Crowdin into TYPO3. Using this feature makes it fast and simple to add translations of XLF files used in the backend.

Introduction

Get starting with online translation and contribute to making TYPO3 better by providing the worlds best CMS available in your favorite language.

Get an overview

Installation

Get the extension installed or updated.

View the installation steps

Configuration

Learn how to load the Crowdin features into both backend and frontend and switch between translating TYPO3 core or your favorite extensions.

Learn how to configure the extension

Troubleshooting

Find solutions on common issues and get help.

Learn how to troubleshoot

Extension key: crowdin
Package name: friendsoftypo3/crowdin
Version: 4.0
Language: en
Author: Georg Ringer, Xavier Perseguers & Contributors
License: This document is published under the Creative Commons BY 4.0 license.
Rendered: Fri, 06 Feb 2026 08:36:57 +0000

Introduction

Tip

New to localization TYPO3 with Crowdin?

Get an introduction in Localization with Crowdin
Getting started with online translation: Online translation with Crowdin

What does it do?

The extension makes a connection between your TYPO3 instance and your account at Crowdin and

Enables you to make in-context translate TYPO3 core and available TYPO3 extensions.
Enables you to see and translate labels directly in both backend and frontend.
Gives you access to the same tools as when translating in Crowdin (Translation Memory, Glossary, etc.).

Once installed, use the Crowdin icon in the TYPO3 top bar to start localizing your TYPO3 instance and extensions:

Toolbar for Crowdin — Context menu for Crowdin in the TYPO3 top bar.

Installation

Important

You will need an account at Crowdin to get efficient utilisation of this extension. An account gives you the role as translator per default.

Using composer
1. composer require friendsoftypo3/crowdin.
2. ./vendor/bin/typo3 crowdin:enable.
Non composer
1. Download the extension from TER.
2. ./typo3/sysext/core/bin/typo3 crowdin:enable.

Additional information

The enable command above writes the following information to config/system/settings.php:

$GLOBALS['TYPO3_CONF_VARS']['SYS']['localization']['locales']['user']['t3'] = 'Crowdin In-Context Localization';
$GLOBALS['TYPO3_CONF_VARS']['SYS']['fluid']['namespaces'] = [
    'f' => [
        'TYPO3\\CMS\\Fluid\\ViewHelpers',
        'TYPO3Fluid\\Fluid\\ViewHelpers',
        'FriendsOfTYPO3\\Crowdin\\ViewHelpers\\Override\\V14',
    ],
];

Note

If you are running TYPO3 v12 or v13, change

FriendsOfTYPO3\\Crowdin\\ViewHelpers\\Override\\V14

into:

FriendsOfTYPO3\\Crowdin\\ViewHelpers\\Override\\V12

Configuration

Log into backend and download at least two language packs from ADMIN TOOLS > Maintenance > Manage Language Packs :
1. The language you want to translate to
2. The language pack Crowdin In-Context Localization [t3]
3. Click Update all
Go to your profile User settings and select Crowdin In-Context Localization [t3] as your Languages
When you click save, TYPO3 will connect to Crowdin and you will be asked to login using your Crowdin Credentials

Translating extensions

You can switch between TYPO3 Core and your local extensions by using the selector in the TYPO3 top bar.

To be able to translate an extension, it needs to be enabled as a project on Crowdin.

Screenshots

When the things are running, you should have access to the Crowdin Modal Tool in the bottom of the browser window:

whereas the Crowdin Icon in the TYPO3 top bar will let you enable/disable in-context localization and switch between translating TYPO3 core or your favorite extensions:

Known problems

Where is the extension in the TYPO3 top bar

If an extension does not appear on the Crowdin list in the TYPO3 top bar, after you've installed it, it is probably because you need to update the language packs. Head over to ADMIN TOOLS > Maintenance > Manage Language Packs and hit the Update all button to get language packs for the newly installed extensions.

How to change the current language I am working on

When you first open the Crowdin interface, you are presented with a list of language you can choose from. But if you later want to change the language you are working on, you can do so by clicking the icon (left) of the Crowdin Modal Tool:

Then click the settings icon:

And finally choose another language from the list:

Crowdin issues

Find a list of open issues on Github.