"bien perdu, bien connu" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {},
      "expansion": "bien perdu, bien connu",
      "name": "fr-phrase"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "That which is well lost is well known, or what once was lost is prized"
      ],
      "id": "en-bien_perdu,_bien_connu-fr-phrase-DSSToKZt"
    }
  ],
  "sounds": [
    {
      "ipa": "/bjɛ̃ pɛʁ.dy | bjɛ̃ kɔ.ny/"
    }
  ],
  "word": "bien perdu, bien connu"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "bien perdu, bien connu",
      "name": "fr-phrase"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "French entries with incorrect language header",
        "French lemmas",
        "French multiword terms",
        "French phrases",
        "French terms with IPA pronunciation"
      ],
      "glosses": [
        "That which is well lost is well known, or what once was lost is prized"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/bjɛ̃ pɛʁ.dy | bjɛ̃ kɔ.ny/"
    }
  ],
  "word": "bien perdu, bien connu"
}