One Map contained in an @context Array MUST contain a name-value pair that defines the default language for the Thing Description, where the name is the Term @language and the value is a well-formed language tag as defined by [BCP47] (e.g., en, de-AT, gsw-CH, zh-Hans, zh-Hant-HK, sl-nedis).
Consider adding a @language member to Thing Descriptions to conform with this assertion.
The WoT Profile specification says:
Consider adding a
@language
member to Thing Descriptions to conform with this assertion.Alternatively, I have suggested that perhaps this assertion should be removed from the specification, see https://github.com/w3c/wot-profile/issues/373