"llingua materna" meaning in Asturian

{
  "head_templates": [
    {
      "args": {
        "1": "ast",
        "2": "noun",
        "g": "f",
        "head": "llingua materna"
      },
      "expansion": "llingua materna f",
      "name": "head"
    }
  ],
  "lang": "Asturian",
  "lang_code": "ast",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Asturian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "mother tongue"
      ],
      "id": "en-llingua_materna-ast-noun-eUb2gChl",
      "links": [
        [
          "mother tongue",
          "mother tongue#English"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "llingua materna"
}

{
  "head_templates": [
    {
      "args": {
        "1": "ast",
        "2": "noun",
        "g": "f",
        "head": "llingua materna"
      },
      "expansion": "llingua materna f",
      "name": "head"
    }
  ],
  "lang": "Asturian",
  "lang_code": "ast",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Asturian entries with incorrect language header",
        "Asturian feminine nouns",
        "Asturian lemmas",
        "Asturian multiword terms",
        "Asturian nouns",
        "Asturian terms with redundant head parameter"
      ],
      "glosses": [
        "mother tongue"
      ],
      "links": [
        [
          "mother tongue",
          "mother tongue#English"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "llingua materna"
}