You are looking at the HTML representation of the RAW format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the RAW format, set format=raw.
See the complete documentation, or API help for more information.
{
    "query": {
        "namespaces": {
            "-2": {
                "id": -2,
                "case": "first-letter",
                "*": "\u041c\u0435\u0434\u0438\u0430",
                "canonical": "Media"
            },
            "-1": {
                "id": -1,
                "case": "first-letter",
                "*": "\u0421\u043b\u0443\u0436\u0435\u0431\u043d\u0430\u044f",
                "canonical": "Special"
            },
            "0": {
                "id": 0,
                "case": "first-letter",
                "*": "",
                "content": ""
            },
            "1": {
                "id": 1,
                "case": "first-letter",
                "*": "\u041e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435",
                "subpages": "",
                "canonical": "Talk"
            },
            "2": {
                "id": 2,
                "case": "first-letter",
                "*": "\u0423\u0447\u0430\u0441\u0442\u043d\u0438\u043a",
                "subpages": "",
                "canonical": "User"
            },
            "3": {
                "id": 3,
                "case": "first-letter",
                "*": "\u041e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u0443\u0447\u0430\u0441\u0442\u043d\u0438\u043a\u0430",
                "subpages": "",
                "canonical": "User talk"
            },
            "4": {
                "id": 4,
                "case": "first-letter",
                "*": "\u0415\u0436\u0435\u0432\u0438\u043a\u0430-\u0422\u0430\u043d\u0430\u0445",
                "subpages": "",
                "canonical": "Project"
            },
            "5": {
                "id": 5,
                "case": "first-letter",
                "*": "\u041e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u0415\u0436\u0435\u0432\u0438\u043a\u0430-\u0422\u0430\u043d\u0430\u0445",
                "subpages": "",
                "canonical": "Project talk"
            },
            "6": {
                "id": 6,
                "case": "first-letter",
                "*": "\u0424\u0430\u0439\u043b",
                "canonical": "File"
            },
            "7": {
                "id": 7,
                "case": "first-letter",
                "*": "\u041e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u0444\u0430\u0439\u043b\u0430",
                "subpages": "",
                "canonical": "File talk"
            },
            "8": {
                "id": 8,
                "case": "first-letter",
                "*": "MediaWiki",
                "subpages": "",
                "canonical": "MediaWiki"
            },
            "9": {
                "id": 9,
                "case": "first-letter",
                "*": "\u041e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 MediaWiki",
                "subpages": "",
                "canonical": "MediaWiki talk"
            },
            "10": {
                "id": 10,
                "case": "first-letter",
                "*": "\u0428\u0430\u0431\u043b\u043e\u043d",
                "canonical": "Template"
            },
            "11": {
                "id": 11,
                "case": "first-letter",
                "*": "\u041e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u0448\u0430\u0431\u043b\u043e\u043d\u0430",
                "subpages": "",
                "canonical": "Template talk"
            },
            "12": {
                "id": 12,
                "case": "first-letter",
                "*": "\u0421\u043f\u0440\u0430\u0432\u043a\u0430",
                "subpages": "",
                "canonical": "Help"
            },
            "13": {
                "id": 13,
                "case": "first-letter",
                "*": "\u041e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u0441\u043f\u0440\u0430\u0432\u043a\u0438",
                "subpages": "",
                "canonical": "Help talk"
            },
            "14": {
                "id": 14,
                "case": "first-letter",
                "*": "\u041a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u044f",
                "canonical": "Category"
            },
            "15": {
                "id": 15,
                "case": "first-letter",
                "*": "\u041e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u0435 \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u0438",
                "subpages": "",
                "canonical": "Category talk"
            },
            "500": {
                "id": 500,
                "case": "first-letter",
                "*": "\u0422\u0410\u041d\u0410\u0425",
                "canonical": "\u0422\u0410\u041d\u0410\u0425"
            },
            "501": {
                "id": 501,
                "case": "first-letter",
                "*": "\u0422\u0410\u041d\u0410\u0425 talk",
                "canonical": "\u0422\u0410\u041d\u0410\u0425 talk"
            },
            "510": {
                "id": 510,
                "case": "first-letter",
                "*": "\u0421\u0422\u0418\u0425",
                "canonical": "\u0421\u0422\u0418\u0425"
            },
            "511": {
                "id": 511,
                "case": "first-letter",
                "*": "\u0421\u0422\u0418\u0425 talk",
                "canonical": "\u0421\u0422\u0418\u0425 talk"
            },
            "520": {
                "id": 520,
                "case": "first-letter",
                "*": "\u041a\u041e\u041c\u041c\u0415\u041d\u0422\u0410\u0420\u0418\u0418",
                "canonical": "\u041a\u041e\u041c\u041c\u0415\u041d\u0422\u0410\u0420\u0418\u0418"
            },
            "521": {
                "id": 521,
                "case": "first-letter",
                "*": "\u041a\u041e\u041c\u041c\u0415\u041d\u0422\u0410\u0420\u0418\u0418 talk",
                "canonical": "\u041a\u041e\u041c\u041c\u0415\u041d\u0422\u0410\u0420\u0418\u0418 talk"
            },
            "522": {
                "id": 522,
                "case": "first-letter",
                "*": "COMMENTS",
                "canonical": "COMMENTS"
            },
            "523": {
                "id": 523,
                "case": "first-letter",
                "*": "COMMENTS talk",
                "canonical": "COMMENTS talk"
            },
            "530": {
                "id": 530,
                "case": "first-letter",
                "*": "\u041f\u0415\u0420\u0415\u0412\u041e\u0414",
                "canonical": "\u041f\u0415\u0420\u0415\u0412\u041e\u0414"
            },
            "531": {
                "id": 531,
                "case": "first-letter",
                "*": "\u041f\u0415\u0420\u0415\u0412\u041e\u0414 talk",
                "canonical": "\u041f\u0415\u0420\u0415\u0412\u041e\u0414 talk"
            },
            "540": {
                "id": 540,
                "case": "first-letter",
                "*": "\u0412\u041d\u0415\u0428\u041d\u0418\u0415 \u0420\u0415\u0421\u0423\u0420\u0421\u042b",
                "canonical": "\u0412\u041d\u0415\u0428\u041d\u0418\u0415 \u0420\u0415\u0421\u0423\u0420\u0421\u042b"
            },
            "541": {
                "id": 541,
                "case": "first-letter",
                "*": "\u0412\u041d\u0415\u0428\u041d\u0418\u0415 \u0420\u0415\u0421\u0423\u0420\u0421\u042b talk",
                "canonical": "\u0412\u041d\u0415\u0428\u041d\u0418\u0415 \u0420\u0415\u0421\u0423\u0420\u0421\u042b talk"
            },
            "542": {
                "id": 542,
                "case": "first-letter",
                "*": "EXTERNAL",
                "canonical": "EXTERNAL"
            },
            "543": {
                "id": 543,
                "case": "first-letter",
                "*": "EXTERNAL talk",
                "canonical": "EXTERNAL talk"
            },
            "550": {
                "id": 550,
                "case": "first-letter",
                "*": "\u0410\u0412\u0422\u041e\u0420\u042b",
                "canonical": "\u0410\u0412\u0422\u041e\u0420\u042b"
            },
            "551": {
                "id": 551,
                "case": "first-letter",
                "*": "\u0410\u0412\u0422\u041e\u0420\u042b talk",
                "canonical": "\u0410\u0412\u0422\u041e\u0420\u042b talk"
            },
            "552": {
                "id": 552,
                "case": "first-letter",
                "*": "AUTHORS",
                "canonical": "AUTHORS"
            },
            "553": {
                "id": 553,
                "case": "first-letter",
                "*": "AUTHORS talk",
                "canonical": "AUTHORS talk"
            },
            "560": {
                "id": 560,
                "case": "first-letter",
                "*": "\u0421\u0422\u0410\u0422\u042c\u0418",
                "canonical": "\u0421\u0422\u0410\u0422\u042c\u0418"
            },
            "561": {
                "id": 561,
                "case": "first-letter",
                "*": "\u0421\u0422\u0410\u0422\u042c\u0418 talk",
                "canonical": "\u0421\u0422\u0410\u0422\u042c\u0418 talk"
            },
            "570": {
                "id": 570,
                "case": "first-letter",
                "*": "TEMP",
                "canonical": "TEMP"
            },
            "571": {
                "id": 571,
                "case": "first-letter",
                "*": "TEMP TALK",
                "canonical": "TEMP TALK"
            },
            "_element": "ns"
        }
    }
}