diff --git a/README.md b/README.md
index 53ad5502f..94f0b12e9 100644
--- a/README.md
+++ b/README.md
@@ -38,33 +38,8 @@ standalone files and git.
 
 ## Languages
 
-Difftastic supports the following languages:
-
-* Bash
-* C
-* C++
-* C#
-* Clojure
-* Common Lisp
-* CSS
-* Dart
-* Elixir
-* Emacs Lisp
-* Go
-* Haskell
-* Janet
-* Java
-* JavaScript (and JSX)
-* JSON
-* Lua
-* Nix
-* OCaml
-* PHP
-* Python
-* Ruby
-* Rust
-* Scala
-* TypeScript (and TSX)
+Difftastic supports over 20 programming languages, see [the
+manual](https://difftastic.wilfred.me.uk/) for the full list.
 
 If a file has an unrecognised extension, difftastic uses a
 textual diff with word highlighting.
diff --git a/manual/src/introduction.md b/manual/src/introduction.md
index a3fb0a102..3a7028ae4 100644
--- a/manual/src/introduction.md
+++ b/manual/src/introduction.md
@@ -19,6 +19,7 @@ tool that understands syntax. It supports the following languages:
 * Java
 * JavaScript (and JSX)
 * JSON
+* Nix
 * OCaml
 * PHP
 * Python