"wenn nicht" meaning in German

{
  "etymology_text": "Literally, \"when not\".",
  "head_templates": [
    {
      "args": {
        "1": "de",
        "2": "conjunction"
      },
      "expansion": "wenn nicht",
      "name": "head"
    }
  ],
  "lang": "German",
  "lang_code": "de",
  "pos": "conj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "German entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "You can't understand me, unless you speak German.",
          "text": "Du kannst mich nicht verstehen, wenn du nicht Deutsch sprichst.",
          "type": "example"
        }
      ],
      "glosses": [
        "unless"
      ],
      "id": "en-wenn_nicht-de-conj-yKafaXVE",
      "links": [
        [
          "unless",
          "unless"
        ]
      ]
    }
  ],
  "word": "wenn nicht"
}

{
  "etymology_text": "Literally, \"when not\".",
  "head_templates": [
    {
      "args": {
        "1": "de",
        "2": "conjunction"
      },
      "expansion": "wenn nicht",
      "name": "head"
    }
  ],
  "lang": "German",
  "lang_code": "de",
  "pos": "conj",
  "senses": [
    {
      "categories": [
        "German conjunctions",
        "German entries with incorrect language header",
        "German lemmas",
        "German multiword terms",
        "German terms with usage examples"
      ],
      "examples": [
        {
          "english": "You can't understand me, unless you speak German.",
          "text": "Du kannst mich nicht verstehen, wenn du nicht Deutsch sprichst.",
          "type": "example"
        }
      ],
      "glosses": [
        "unless"
      ],
      "links": [
        [
          "unless",
          "unless"
        ]
      ]
    }
  ],
  "word": "wenn nicht"
}