If you are using the iTunes Connect API via fastlane or spaceship and would like to access your app meta data by language, below is a chart of the language codes that spaceship converts the iTunes Connect languages into. In addition, if you are localizing your app in Xcode for multiple locales of the same language. You should probably use the base language and omit the locale for at least one locale so that any other locales you omit have a fall back language to use.
