If a language is provided, it must be provided in all multi-language places, otherwise the validation will fail:
error executing command: validate language code failed: only some multi-language sections include the en language.
If you want to support a language, make sure all multi-language sections(displayName, description and provider etc.) include that language
If a language is provided, it must be provided in all multi-language places, otherwise the validation will fail:
ref #60