Note that lang-plaintext or lang-none explicitly disables syntax highlighting.
Quote from post edited 30 Aug, 2022.
Language codes currently available on Stack Exchange
This is a complete list of every identifier that you can use in a language hint for syntax highlighting. All the language identifiers in each group point to the same highlighter. Other language aliases set by highlight.js (in brackets) should work, but only identifiers before them are officially supported by Stack Exchange.
Format: Language name:
lang-code, custom Stack Exchange aliases, (other Highlight.js aliases)
- Plain text:
lang-plaintext,lang-none, (lang-text,lang-txt) (explicitly disables syntax highlighting)- Bash and other shell scripts:
lang-bash,lang-bsh,lang-csh,lang-sh- C and C-likes:
lang-c,lang-cyc,lang-m,lang-c-like, (lang-h)- Clojure:
lang-clojure,lang-clj- CoffeeScript:
lang-coffeescript,lang-coffee, (lang-cson,lang-iced)- C++:
lang-cpp,lang-cc,lang-cxx, (lang-c++,lang-h++,lang-hpp,lang-hh,lang-hxx)- C#:
lang-csharp,lang-cs, (lang-c#)- CSS:
lang-css- Dart:
lang-dart- Delphi, Pascal:
lang-delphi, (lang-dpr,lang-dfm,lang-pas,lang-pascal)- Erlang:
lang-erlang,lang-erl- Go:
lang-go, (lang-golang)- Haskell:
lang-haskell,lang-hs- HTTP request/response:
lang-http, (lang-https)- INI, TOML:
lang-ini, (lang-toml)- Java:
lang-java, (lang-jsp)- JavaScript:
lang-javascript,lang-js, (lang-jsx,lang-mjs,lang-cjs)- JSON:
lang-json- Kotlin:
lang-kotlin, (lang-kt,lang-kts)- LaTeX, TeX:
lang-latex,lang-tex- Less:
lang-less- Lisp:
lang-lisp,lang-cl,lang-el,lang-lsp- Lua:
lang-lua- Makefile:
lang-makefile, (lang-mk,lang-mak,lang-make)- Markdown:
lang-markdown, (lang-md,lang-mkdown,lang-mkd)- Mathematica / Wolfram Language:
lang-mathematica,lang-mma, (lang-wl) (Mathematica SE only)- MATLAB:
lang-matlab- Objective-C:
lang-objectivec, (lang-mm,lang-objc,lang-obj-c,lang-obj-c++,lang-objective-c++)- OCaml, F#, SML and other ML-family languages:
lang-ocaml,lang-fs,lang-ml- Perl:
lang-perl,lang-pl, (lang-pm)- PHP:
lang-php- PHP template (HTML+PHP):
lang-php-template- Protocol Buffers:
lang-protobuf- Python:
lang-python,lang-py,lang-cv, (lang-gyp,lang-ipython)- R, S:
lang-r,lang-s- Ruby:
lang-ruby,lang-rb, (lang-gemspec,lang-podspec,lang-thor,lang-irb)- Rust:
lang-rust,lang-rc,lang-rs- Scala:
lang-scala- Scheme, Racket:
lang-scheme,lang-scm,lang-ss,lang-rkt- SCSS:
lang-scss- Shell session:
lang-shell, (lang-console,lang-shellsession)- SQL:
lang-sql- Swift:
lang-swift- TypeScript:
lang-typescript, (lang-ts,lang-tsx)- Visual Basic (.NET), VBScript:
lang-vbnet,lang-vb,lang-vbs- VHDL:
lang-vhdl,lang-vhd- XML, HTML and their derivatives:
lang-xml,lang-html,lang-xsl, (lang-xhtml,lang-rss,lang-atom,lang-xjb,lang-xsd,lang-plist,lang-wsf,lang-svg)- YAML:
lang-yaml, (lang-yml)