Hello Alix, you where right! There was a bug in the LanguageChooser.js file. It's fixed now both in the RenJSMultilanguage example and in the RenJSQuicktstart. You just need to replace that file with the updated one and it should work. https://gitlab.com/lunafromthemoon/RenJSMultilanguage/blob/master/RenJS/Language...
Thanks for the bug report!