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.