Batch upsert translations

const options = {
  method: 'POST',
  headers: {
    'x-spree-api-key': '<api-key>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    translations: [{resource_type: '<string>', resource_id: '<string>', values: {}}]
  })
};

fetch('http://{defaultHost}/api/v3/admin/translations/batch', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request POST \
  --url http://{defaultHost}/api/v3/admin/translations/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-spree-api-key: <api-key>' \
  --data '
{
  "translations": [
    {
      "resource_type": "<string>",
      "resource_id": "<string>",
      "values": {}
    }
  ]
}
'

{
  "data": [
    {
      "resource_id": "opt_UkLWZg9DAJ",
      "resource_type": "option_type",
      "translations": {
        "de": {
          "label": "Größe",
          "translated_field_count": 1
        },
        "fr": {
          "label": null,
          "translated_field_count": 0
        }
      },
      "default_locale": "en",
      "supported_locales": [
        "de",
        "en",
        "fr"
      ]
    },
    {
      "resource_id": "optval_UkLWZg9DAJ",
      "resource_type": "option_value",
      "translations": {
        "de": {
          "label": "Klein",
          "translated_field_count": 1
        },
        "fr": {
          "label": null,
          "translated_field_count": 0
        }
      },
      "default_locale": "en",
      "supported_locales": [
        "de",
        "en",
        "fr"
      ]
    }
  ]
}

{
  "error": {
    "code": "validation_error",
    "message": "Unsupported locale(s): es",
    "details": {
      "translations": {
        "0": [
          "Unsupported locale(s): es"
        ]
      }
    }
  }
}