"en foi de quoi" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {},
      "expansion": "en foi de quoi",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Law",
          "orig": "fr:Law",
          "parents": [
            "Justice",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "in witness whereof (words announcing the concluding clause in deeds)"
      ],
      "id": "en-en_foi_de_quoi-fr-phrase-EwmnwXpI",
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "in witness whereof",
          "in witness whereof"
        ]
      ],
      "raw_glosses": [
        "(law) in witness whereof (words announcing the concluding clause in deeds)"
      ],
      "synonyms": [
        {
          "word": "en vertu de quoi"
        },
        {
          "word": "sur foi de quoi"
        }
      ],
      "topics": [
        "law"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɑ̃ fwa də kwa/"
    }
  ],
  "word": "en foi de quoi"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "en foi de quoi",
      "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",
        "Pages with 1 entry",
        "Pages with entries",
        "fr:Law"
      ],
      "glosses": [
        "in witness whereof (words announcing the concluding clause in deeds)"
      ],
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "in witness whereof",
          "in witness whereof"
        ]
      ],
      "raw_glosses": [
        "(law) in witness whereof (words announcing the concluding clause in deeds)"
      ],
      "synonyms": [
        {
          "word": "en vertu de quoi"
        }
      ],
      "topics": [
        "law"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɑ̃ fwa də kwa/"
    }
  ],
  "synonyms": [
    {
      "word": "sur foi de quoi"
    }
  ],
  "word": "en foi de quoi"
}