| J | J, Java, JavaScript, JSON, Jsonnet, Julia, Jungle |

| K | Kotlin |

| L | Lighttpd configuration file, LLVM, Lua |

| M | Makefile, Mako, markdown, Mason, Materialize SQL dialect, Mathematica, Matlab, MCFunction, Meson, Metal, MiniZinc, MLIR, Modula-2, Mojo, MonkeyC, MorrowindScript, Myghty, MySQL |

| N | NASM, Natural, Newspeak, Nginx configuration file, Nim, Nix, NSIS |

| O | Objective-C, OCaml, Octave, Odin, OnesEnterprise, OpenEdge ABL, OpenSCAD, Org Mode |

| P | PacmanConf, Perl, PHP, PHTML, Pig, PkgConfig, PL/pgSQL, plaintext, Plutus Core, Pony, PostgreSQL SQL dialect, PostScript, POVRay, PowerQuery, PowerShell, Prolog, PromQL, Promela, properties, Protocol Buffer, PRQL, PSL, Puppet, Python, Python 2 |