Important: #89992 - Use new Translation Server¶
See Issue #89992
The work on the new translation server has been finalized so that it is used by default.
The SaaS solution Crowdin is being used to make it as simple as possible for everyone to improve the localization of TYPO3 core and all extensions which are taking part.
If you are interested in improving the localization, register at https://crowdin.com/ and suggest translations at the official TYPO3 Project, which can be found at https://crowdin.com/project/typo3-cms.
The documentation about the integration is part of the official TYPO3 documentation and is available at https://docs.typo3.org/m/typo3/reference-coreapi/master/en-us/ApiOverview/Internationalization/TranslationServer/Crowdin.html. It also covers how to make your extension as extension developer available at Crowdin.