When using CI to upload an app using fastlane I get the following error
Please enter one of available languages: ["Arabic", "Catalan", "Croatian", "Czech", "Brazilian Portuguese", "Danish", "Dutch", "English", "English_Australian", "English_CA", "English_UK", "Finnish", "French", "French_CA", "German", "Greek", "Hebrew", "Hindi", "Hungarian", "Indonesian", "Italian", "Japanese", "Korean", "Malay", "Norwegian", "Polish", "Portuguese", "Romanian", "Russian", "Simplified Chinese", "Slovak", "Spanish", "Spanish_MX", "Swedish", "Ukrainian", "Thai", "Traditional Chinese", "Turkish", "Vietnamese"]
This does not happen if I upload using my own machine and only happens for new apps that are not yet on itunesconnect.
I'm quite inexperienced with fastlane so maybe I'm missing something really easy.
I do have a de-De language folder that fastlane should be used for the language but it's not working.
I solved it by copying the de-De folder into our Fastlane folder. Apparently this was the issue. I'm not sure why it worked on my machine but not on CI like this.