GetDefaultLanguage reads default language from config.

UserLanguage looks for the user roles and check if a language parameter is set (starting from the last).

UserLanguageFromContext tries to find Claims in context and get the language for the corresponding user.

UserLanguagesFromRestRequest tries to find user language from various sources: X-Pydio-Language header, user language inside the system (set via roles), or Accept-Language standard header.

AvailableLanguages stores a manually maintained maps with all languages that are currently supported by Cells front-end and can be chosen via the interface.

LoadingStrings have to be hard-coded to be loaded first.

WipLanguages lists languages that are only partially translated and only exposed in the end-user web UI when CELLS_ENABLE_WIP_LANGUAGES env variable is set to true.