The default "languages" supported in prettier

languages.json

[
  {
    "name": "JavaScript",
    "type": "programming",
    "tmScope": "source.js",
    "aceMode": "javascript",
    "codemirrorMode": "javascript",
    "codemirrorMimeType": "text/javascript",
    "color": "#f1e05a",
    "aliases": [
      "js",
      "node"
    ],
    "extensions": [
      ".js",
      "._js",
      ".bones",
      ".es",
      ".es6",
      ".frag",
      ".gs",
      ".jake",
      ".jsb",
      ".jscad",
      ".jsfl",
      ".jsm",
      ".jss",
      ".mjs",
      ".njs",
      ".pac",
      ".sjs",
      ".ssjs",
      ".xsjs",
      ".xsjslib"
    ],
    "filenames": [
      "Jakefile"
    ],
    "interpreters": [
      "node",
      "nodejs"
    ],
    "linguistLanguageId": 183,
    "since": "0.0.0",
    "parsers": [
      "babel",
      "flow"
    ],
    "vscodeLanguageIds": [
      "javascript"
    ]
  },
  {
    "name": "Flow",
    "type": "programming",
    "tmScope": "source.js",
    "aceMode": "javascript",
    "codemirrorMode": "javascript",
    "codemirrorMimeType": "text/javascript",
    "color": "#f1e05a",
    "aliases": [],
    "extensions": [
      ".js.flow"
    ],
    "filenames": [],
    "interpreters": [
      "node"
    ],
    "linguistLanguageId": 183,
    "since": "0.0.0",
    "parsers": [
      "babel",
      "flow"
    ],
    "vscodeLanguageIds": [
      "javascript"
    ]
  },
  {
    "name": "JSX",
    "type": "programming",
    "group": "JavaScript",
    "extensions": [
      ".jsx"
    ],
    "tmScope": "source.js.jsx",
    "aceMode": "javascript",
    "codemirrorMode": "jsx",
    "codemirrorMimeType": "text/jsx",
    "linguistLanguageId": 178,
    "since": "0.0.0",
    "parsers": [
      "babel",
      "flow"
    ],
    "vscodeLanguageIds": [
      "javascriptreact"
    ]
  },
  {
    "name": "TypeScript",
    "type": "programming",
    "color": "#2b7489",
    "aliases": [
      "ts"
    ],
    "extensions": [
      ".ts",
      ".tsx"
    ],
    "tmScope": "source.ts",
    "aceMode": "typescript",
    "codemirrorMode": "javascript",
    "codemirrorMimeType": "application/typescript",
    "linguistLanguageId": 378,
    "since": "1.4.0",
    "parsers": [
      "typescript"
    ],
    "vscodeLanguageIds": [
      "typescript",
      "typescriptreact"
    ]
  },
  {
    "name": "JSON.stringify",
    "type": "data",
    "tmScope": "source.json",
    "group": "JavaScript",
    "aceMode": "json",
    "codemirrorMode": "javascript",
    "codemirrorMimeType": "application/json",
    "searchable": false,
    "extensions": [],
    "filenames": [
      "package.json",
      "package-lock.json",
      "composer.json"
    ],
    "linguistLanguageId": 174,
    "since": "1.13.0",
    "parsers": [
      "json-stringify"
    ],
    "vscodeLanguageIds": [
      "json"
    ]
  },
  {
    "name": "JSON",
    "type": "data",
    "tmScope": "source.json",
    "group": "JavaScript",
    "aceMode": "json",
    "codemirrorMode": "javascript",
    "codemirrorMimeType": "application/json",
    "searchable": false,
    "extensions": [
      ".json",
      ".avsc",
      ".geojson",
      ".gltf",
      ".JSON-tmLanguage",
      ".jsonl",
      ".tfstate",
      ".tfstate.backup",
      ".topojson",
      ".webapp",
      ".webmanifest"
    ],
    "filenames": [
      ".arcconfig",
      ".htmlhintrc",
      ".tern-config",
      ".tern-project",
      "composer.lock",
      "mcmod.info",
      ".prettierrc"
    ],
    "linguistLanguageId": 174,
    "since": "1.5.0",
    "parsers": [
      "json"
    ],
    "vscodeLanguageIds": [
      "json"
    ]
  },
  {
    "name": "JSON with Comments",
    "type": "data",
    "group": "JSON",
    "tmScope": "source.js",
    "aceMode": "javascript",
    "codemirrorMode": "javascript",
    "codemirrorMimeType": "text/javascript",
    "aliases": [
      "jsonc"
    ],
    "extensions": [
      ".sublime-build",
      ".sublime-commands",
      ".sublime-completions",
      ".sublime-keymap",
      ".sublime-macro",
      ".sublime-menu",
      ".sublime-mousemap",
      ".sublime-project",
      ".sublime-settings",
      ".sublime-theme",
      ".sublime-workspace",
      ".sublime_metrics",
      ".sublime_session"
    ],
    "filenames": [
      ".babelrc",
      ".eslintrc.json",
      ".jscsrc",
      ".jshintrc",
      ".jslintrc",
      "tsconfig.json",
      ".eslintrc"
    ],
    "linguistLanguageId": 423,
    "since": "1.5.0",
    "parsers": [
      "json"
    ],
    "vscodeLanguageIds": [
      "jsonc"
    ]
  },
  {
    "name": "JSON5",
    "type": "data",
    "extensions": [
      ".json5"
    ],
    "tmScope": "source.js",
    "aceMode": "javascript",
    "codemirrorMode": "javascript",
    "codemirrorMimeType": "application/json",
    "linguistLanguageId": 175,
    "since": "1.13.0",
    "parsers": [
      "json5"
    ],
    "vscodeLanguageIds": [
      "json5"
    ]
  },
  {
    "name": "CSS",
    "type": "markup",
    "tmScope": "source.css",
    "aceMode": "css",
    "codemirrorMode": "css",
    "codemirrorMimeType": "text/css",
    "color": "#563d7c",
    "extensions": [
      ".css"
    ],
    "linguistLanguageId": 50,
    "since": "1.4.0",
    "parsers": [
      "css"
    ],
    "vscodeLanguageIds": [
      "css"
    ]
  },
  {
    "name": "PostCSS",
    "type": "markup",
    "tmScope": "source.postcss",
    "group": "CSS",
    "extensions": [
      ".pcss",
      ".postcss"
    ],
    "aceMode": "text",
    "linguistLanguageId": 262764437,
    "since": "1.4.0",
    "parsers": [
      "css"
    ],
    "vscodeLanguageIds": [
      "postcss"
    ]
  },
  {
    "name": "Less",
    "type": "markup",
    "group": "CSS",
    "extensions": [
      ".less"
    ],
    "tmScope": "source.css.less",
    "aceMode": "less",
    "codemirrorMode": "css",
    "codemirrorMimeType": "text/css",
    "linguistLanguageId": 198,
    "since": "1.4.0",
    "parsers": [
      "less"
    ],
    "vscodeLanguageIds": [
      "less"
    ]
  },
  {
    "name": "SCSS",
    "type": "markup",
    "tmScope": "source.scss",
    "group": "CSS",
    "aceMode": "scss",
    "codemirrorMode": "css",
    "codemirrorMimeType": "text/x-scss",
    "extensions": [
      ".scss"
    ],
    "linguistLanguageId": 329,
    "since": "1.4.0",
    "parsers": [
      "scss"
    ],
    "vscodeLanguageIds": [
      "scss"
    ]
  },
  {
    "name": "GraphQL",
    "type": "data",
    "extensions": [
      ".graphql",
      ".gql"
    ],
    "tmScope": "source.graphql",
    "aceMode": "text",
    "linguistLanguageId": 139,
    "since": "1.5.0",
    "parsers": [
      "graphql"
    ],
    "vscodeLanguageIds": [
      "graphql"
    ]
  },
  {
    "name": "Markdown",
    "type": "prose",
    "aliases": [
      "pandoc"
    ],
    "aceMode": "markdown",
    "codemirrorMode": "gfm",
    "codemirrorMimeType": "text/x-gfm",
    "wrap": true,
    "extensions": [
      ".md",
      ".markdown",
      ".mdown",
      ".mdwn",
      ".mkd",
      ".mkdn",
      ".mkdown",
      ".ronn",
      ".workbook"
    ],
    "tmScope": "source.gfm",
    "linguistLanguageId": 222,
    "filenames": [
      "README"
    ],
    "since": "1.8.0",
    "parsers": [
      "markdown"
    ],
    "vscodeLanguageIds": [
      "markdown"
    ]
  },
  {
    "name": "MDX",
    "extensions": [
      ".mdx"
    ],
    "since": "1.15.0",
    "parsers": [
      "mdx"
    ],
    "vscodeLanguageIds": [
      "mdx"
    ]
  },
  {
    "name": "Angular",
    "type": "markup",
    "tmScope": "text.html.basic",
    "aceMode": "html",
    "codemirrorMode": "htmlmixed",
    "codemirrorMimeType": "text/html",
    "color": "#e34c26",
    "aliases": [
      "xhtml"
    ],
    "extensions": [
      ".component.html"
    ],
    "linguistLanguageId": 146,
    "since": "1.15.0",
    "parsers": [
      "angular"
    ],
    "vscodeLanguageIds": [
      "html"
    ],
    "filenames": []
  },
  {
    "name": "HTML",
    "type": "markup",
    "tmScope": "text.html.basic",
    "aceMode": "html",
    "codemirrorMode": "htmlmixed",
    "codemirrorMimeType": "text/html",
    "color": "#e34c26",
    "aliases": [
      "xhtml"
    ],
    "extensions": [
      ".html",
      ".htm",
      ".html.hl",
      ".inc",
      ".st",
      ".xht",
      ".xhtml",
      ".mjml"
    ],
    "linguistLanguageId": 146,
    "since": "1.15.0",
    "parsers": [
      "html"
    ],
    "vscodeLanguageIds": [
      "html"
    ]
  },
  {
    "name": "Lightning Web Components",
    "type": "markup",
    "tmScope": "text.html.basic",
    "aceMode": "html",
    "codemirrorMode": "htmlmixed",
    "codemirrorMimeType": "text/html",
    "color": "#e34c26",
    "aliases": [
      "xhtml"
    ],
    "extensions": [],
    "linguistLanguageId": 146,
    "since": "1.17.0",
    "parsers": [
      "lwc"
    ],
    "vscodeLanguageIds": [
      "html"
    ],
    "filenames": []
  },
  {
    "name": "Vue",
    "type": "markup",
    "color": "#2c3e50",
    "extensions": [
      ".vue"
    ],
    "tmScope": "text.html.vue",
    "aceMode": "html",
    "linguistLanguageId": 391,
    "since": "1.10.0",
    "parsers": [
      "vue"
    ],
    "vscodeLanguageIds": [
      "vue"
    ]
  },
  {
    "name": "YAML",
    "type": "data",
    "tmScope": "source.yaml",
    "aliases": [
      "yml"
    ],
    "extensions": [
      ".yml",
      ".mir",
      ".reek",
      ".rviz",
      ".sublime-syntax",
      ".syntax",
      ".yaml",
      ".yaml-tmlanguage",
      ".yml.mysql"
    ],
    "filenames": [
      ".clang-format",
      ".clang-tidy",
      ".gemrc",
      "glide.lock"
    ],
    "aceMode": "yaml",
    "codemirrorMode": "yaml",
    "codemirrorMimeType": "text/x-yaml",
    "linguistLanguageId": 407,
    "since": "1.14.0",
    "parsers": [
      "yaml"
    ],
    "vscodeLanguageIds": [
      "yaml"
    ]
  }
]