"mother tongues" meaning in All languages combined

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
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          "word": "mother tongue"
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      "id": "en-mother_tongues-en-noun-iWtxjFvK",
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  "word": "mother tongues"
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  "lang_code": "en",
  "pos": "noun",
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