support for @language in SDTT

Hello,

Has anyone tested `@language` support in SDTT?

>From a little experiment I can see that I can specify the default language
using

{
   "@context":{
      "@vocab":"http://schema.org/",
      "@language":"en",

...

However it seems that the only way to specify additional languages is to
add terms to the `@context` such as:

      "givenName_zh":{
         "@id":"givenName",
         "@language":"zh"

...

Does it look right to you?

This is the little experiment I ran:

{
   "@context":{
      "@vocab":"http://schema.org/",
      "@language":"en",
      "givenName_zh":{
         "@id":"givenName",
         "@language":"zh"
      },
      "givenName_i18n":{
         "@id":"givenName",
         "@container":"@language"
      }
   },
   "@type":"Person",
   "givenName":[
      "David",
      {
         "@value":"데이빗",
         "@language":"ko"
      }
   ],
   "givenName_zh":"大卫",
   "givenName_i18n":{
      "ja":"ダビド"
   },
   "familyName":"Riccitelli"
}


BR
David

ref https://github.com/insideout10/wordlift-plugin/issues/844