"watch one's language" meaning in English

{
  "forms": [
    {
      "form": "watches one's language",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "watching one's language",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "watched one's language",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "watched one's language",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "watch one's language (third-person singular simple present watches one's language, present participle watching one's language, simple past and past participle watched one's language)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              12,
              31
            ]
          ],
          "text": "You need to watch your language here. These people are very religious.",
          "type": "example"
        },
        {
          "bold_text_offsets": [
            [
              109,
              128
            ]
          ],
          "ref": "1993, John Lahr, The Manchurian Candidate: A Play [...] From the Novel by Richard Condon, New York, N.Y.: Dramatists Play Service, →ISBN, page 72:",
          "text": "And I put my hands on her jugs. She goes crazy. She says 'Take your hands off me slimeball!' So I go, 'Rona, watch your language!' And she goes, 'If you wanna have fun with your hands, why don't you pass the time playin' solitaire.'",
          "type": "quote"
        }
      ],
      "glosses": [
        "To be careful about what one says, in particular the avoidance of foul language."
      ],
      "id": "en-watch_one's_language-en-verb-8MJMVxlr",
      "links": [
        [
          "foul language",
          "foul language"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To be careful about what one says, in particular the avoidance of foul language."
      ],
      "tags": [
        "idiomatic"
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "watch one's language",
          "word": "surveiller son vocabulaire"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "watch one's language",
          "word": "surveiller son langage"
        }
      ]
    }
  ],
  "word": "watch one's language"
}

{
  "forms": [
    {
      "form": "watches one's language",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "watching one's language",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "watched one's language",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "watched one's language",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "watch one's language (third-person singular simple present watches one's language, present participle watching one's language, simple past and past participle watched one's language)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English terms with usage examples",
        "English verbs",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with French translations"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              12,
              31
            ]
          ],
          "text": "You need to watch your language here. These people are very religious.",
          "type": "example"
        },
        {
          "bold_text_offsets": [
            [
              109,
              128
            ]
          ],
          "ref": "1993, John Lahr, The Manchurian Candidate: A Play [...] From the Novel by Richard Condon, New York, N.Y.: Dramatists Play Service, →ISBN, page 72:",
          "text": "And I put my hands on her jugs. She goes crazy. She says 'Take your hands off me slimeball!' So I go, 'Rona, watch your language!' And she goes, 'If you wanna have fun with your hands, why don't you pass the time playin' solitaire.'",
          "type": "quote"
        }
      ],
      "glosses": [
        "To be careful about what one says, in particular the avoidance of foul language."
      ],
      "links": [
        [
          "foul language",
          "foul language"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To be careful about what one says, in particular the avoidance of foul language."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "watch one's language",
      "word": "surveiller son vocabulaire"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "watch one's language",
      "word": "surveiller son langage"
    }
  ],
  "word": "watch one's language"
}