Inconsistency in metadata from original data provider - EEXCESS format

[pstoehr]

This result of a recommend request

{
  "resultGroup": [

  ],
  "documentBadge": {
    "id": "10010471719",
    "uri": "http:\/\/www.econbiz.de\/Record\/10010471719",
    "provider": "ZBW"
  },
  "mediaType": "text",
  "title": "Reliability measures of a computer system with priority to PM over the H\/W repair activities subject to MOT and MRT",
  "date": "2015-01-01",
  "language": "de",
  "licence": "restricted",
  "generatingQuery": "Computer"
},

marks "de" as language.
At econbiz.de the entry (http://www.econbiz.de/Record/10010471719) is marked with "Sprache: Englisch".