diff --git a/preview/codly-languages/.gitignore b/preview/codly-languages/.gitignore
new file mode 100644
index 0000000..f1ca904
--- /dev/null
+++ b/preview/codly-languages/.gitignore
@@ -0,0 +1,2 @@
+tests/**/out/
+tests/**/diff/
diff --git a/preview/codly-languages/README.md b/preview/codly-languages/README.md
index 1aeb2fc..987a6a1 100644
--- a/preview/codly-languages/README.md
+++ b/preview/codly-languages/README.md
@@ -13,7 +13,7 @@ Configure `codly` with the languages. Like this:
 #import "@preview/codly:1.0.0": *
 #show: codly-init
 
-#import "@preview/codly-languages:0.1.1": *
+#import "@preview/codly-languages:0.1.2": *
 #codly(languages: codly-languages)
 ```
 
diff --git a/preview/codly-languages/lib.typ b/preview/codly-languages/lib.typ
index b26f437..3b737ea 100644
--- a/preview/codly-languages/lib.typ
+++ b/preview/codly-languages/lib.typ
@@ -22,8 +22,9 @@
   }
 
   // configurations for languages
-  let base-languages = (
+  (
     aarch64:       (name: "Assembly (ARM)",   color: rgb("#1b3888"), icon: __icon("aarch64.svg")),
+      arm:         (name: "Assembly (ARM)",   color: rgb("#1b3888"), icon: __icon("aarch64.svg")),
     angular:       (name: "Angular",          color: rgb("#dd0031"), icon: __icon("angular.svg")),
     ansible:       (name: "Ansible",          color: rgb("#1a1918"), icon: __icon("ansible.svg")),
     apache:        (name: "Apache",           color: rgb("#b7342a"), icon: __icon("apache.svg")),
@@ -32,35 +33,51 @@
     c:             (name: "C",                color: rgb("#659ad3"), icon: __icon("c.svg")),
     cairo:         (name: "Cairo",            color: rgb("#f39914"), icon: __icon("cairo.svg")),
     clojure:       (name: "Clojure",          color: rgb("#ffffff"), icon: __icon("clojure.svg")),
+      clj:         (name: "Clojure",          color: rgb("#ffffff"), icon: __icon("clojure.svg")),
     clojurescript: (name: "ClojureScript",    color: rgb("#96ca4b"), icon: __icon("clojurescript.svg")),
+      cljs:        (name: "ClojureScript",    color: rgb("#96ca4b"), icon: __icon("clojurescript.svg")),
     cmake:         (name: "CMake",            color: rgb("#064f8c"), icon: __icon("cmake.svg")),
     coffeescript:  (name: "CoffeeScript",     color: rgb("#28334c"), icon: __icon("coffeescript.svg")),
+      coffee:      (name: "CoffeeScript",     color: rgb("#28334c"), icon: __icon("coffeescript.svg")),
     cplusplus:     (name: "C++",              color: rgb("#00599c"), icon: __icon("cplusplus.svg")),
+      cpp:         (name: "C++",              color: rgb("#00599c"), icon: __icon("cplusplus.svg")),
+      cxx:         (name: "C++",              color: rgb("#00599c"), icon: __icon("cplusplus.svg")),
     crystal:       (name: "Crystal",          color: rgb("#000000"), icon: __icon("crystal.svg")),
     csharp:        (name: "C#",               color: rgb("#9b4f96"), icon: __icon("csharp.svg")),
+      cs:          (name: "C#",               color: rgb("#9b4f96"), icon: __icon("csharp.svg")),
     css:           (name: "CSS",              color: rgb("#1572b6"), icon: __icon("css3.svg")),
     dart:          (name: "Dart",             color: rgb("#00c4b3"), icon: __icon("dart.svg")),
     docker:        (name: "Docker",           color: rgb("#3a4d54"), icon: __icon("docker.svg")),
+      dockerfile:  (name: "Docker",           color: rgb("#3a4d54"), icon: __icon("docker.svg")),
     elixir:        (name: "Elixir",           color: rgb("#685574"), icon: __icon("elixir.svg")),
+      ex:          (name: "Elixir",           color: rgb("#685574"), icon: __icon("elixir.svg")),
     elm:           (name: "Elm",              color: rgb("#efa500"), icon: __icon("elm.svg")),
     emacs:         (name: "Emacs",            color: rgb("#421f5f"), icon: __icon("emacs.svg")),
     erlang:        (name: "Erlang",           color: rgb("#a90533"), icon: __icon("erlang.svg")),
+      erl:         (name: "Erlang",           color: rgb("#a90533"), icon: __icon("erlang.svg")),
     fortran:       (name: "Fortran",          color: rgb("#734c94"), icon: __icon("fortran.svg")),
     fsharp:        (name: "F#",               color: rgb("#378bba"), icon: __icon("fsharp.svg")),
+      fs:          (name: "F#",               color: rgb("#378bba"), icon: __icon("fsharp.svg")),
     git:           (name: "Git",              color: rgb("#f34f29"), icon: __icon("git.svg")),
     go:            (name: "Go",               color: rgb("#f6d2a2"), icon: __icon("go.svg")),
+      golang:      (name: "Go",               color: rgb("#f6d2a2"), icon: __icon("go.svg")),
     graphql:       (name: "GraphQL",          color: rgb("#e434aa"), icon: __icon("graphql.svg")),
     groovy:        (name: "Groovy",           color: rgb("#619cbc"), icon: __icon("groovy.svg")),
     grpc:          (name: "gRPC",             color: rgb("#3d5a60"), icon: __icon("grpc.svg")),
     handlebars:    (name: "Handlebars",       color: rgb("#000000"), icon: __icon("handlebars.svg")),
     haskell:       (name: "Haskell",          color: rgb("#463b63"), icon: __icon("haskell.svg")),
+      hs:          (name: "Haskell",          color: rgb("#463b63"), icon: __icon("haskell.svg")),
     haxe:          (name: "Haxe",             color: rgb("#f6b214"), icon: __icon("haxe.svg")),
     html:          (name: "HTML",             color: rgb("#e44d26"), icon: __icon("html5.svg")),
+      html5:       (name: "HTML",             color: rgb("#e44d26"), icon: __icon("html5.svg")),
     java:          (name: "Java",             color: rgb("#0074bd"), icon: __icon("java.svg")),
     javascript:    (name: "JavaScript",       color: rgb("#f0db4f"), icon: __icon("javascript.svg")),
+      js:          (name: "JavaScript",       color: rgb("#f0db4f"), icon: __icon("javascript.svg")),
     json:          (name: "JSON",             color: rgb("#6d6d6d"), icon: __icon("json.svg")),
     julia:         (name: "Julia",            color: rgb("#cb3c33"), icon: __icon("julia.svg")),
+      jl:          (name: "Julia",            color: rgb("#cb3c33"), icon: __icon("julia.svg")),
     kotlin:        (name: "Kotlin",           color: rgb("#5e3cc2"), icon: __icon("kotlin.svg")),
+      kt:          (name: "Kotlin",           color: rgb("#5e3cc2"), icon: __icon("kotlin.svg")),
     latex:         (name: "LaTeX",            color: rgb("#000000"), icon: __icon("latex.svg")),
     less:          (name: "Less",             color: rgb("#2a4d80"), icon: __icon("less.svg")),
     lua:           (name: "Lua",              color: rgb("#000080"), icon: __icon("lua.svg")),
@@ -68,94 +85,73 @@
     matlab:        (name: "Matlab",           color: rgb("#4499dd"), icon: __icon("matlab.svg")),
     mysql:         (name: "MySQL",            color: rgb("#00618a"), icon: __icon("mysql.svg")),
     neovim:        (name: "Neovim",           color: rgb("#517d37"), icon: __icon("neovim.svg")),
+      nvim:        (name: "Neovim",           color: rgb("#517d37"), icon: __icon("neovim.svg")),
     nginx:         (name: "Nginx",            color: rgb("#009900"), icon: __icon("nginx.svg")),
     nim:           (name: "Nim",              color: rgb("#f3d400"), icon: __icon("nim.svg")),
     nix:           (name: "Nix",              color: rgb("#7ebae4"), icon: __icon("nixos.svg")),
+      nixos:       (name: "Nix",              color: rgb("#7ebae4"), icon: __icon("nixos.svg")),
     objectivec:    (name: "Objective-C",      color: rgb("#0b5a9d"), icon: __icon("objectivec.svg")),
+      objc:        (name: "Objective-C",      color: rgb("#0b5a9d"), icon: __icon("objectivec.svg")),
+      obj-c:       (name: "Objective-C",      color: rgb("#0b5a9d"), icon: __icon("objectivec.svg")),
     ocaml:         (name: "OCaml",            color: rgb("#484444"), icon: __icon("ocaml.svg")),
+      ml:          (name: "OCaml",            color: rgb("#484444"), icon: __icon("ocaml.svg")),
     perl:          (name: "Perl",             color: rgb("#ffffff"), icon: __icon("perl.svg")),
+      pl:          (name: "Perl",             color: rgb("#ffffff"), icon: __icon("perl.svg")),
     php:           (name: "PHP",              color: rgb("#5c5e8d"), icon: __icon("php.svg")),
     postgresql:    (name: "PostgreSQL",       color: rgb("#336791"), icon: __icon("postgresql.svg")),
     powershell:    (name: "PowerShell",       color: rgb("#1f2939"), icon: __icon("powershell.svg")),
+      ps1:         (name: "PowerShell",       color: rgb("#1f2939"), icon: __icon("powershell.svg")),
     processing:    (name: "Processing",       color: rgb("#6e8375"), icon: __icon("processing.svg")),
     prolog:        (name: "Prolog",           color: rgb("#d6552d"), icon: __icon("prolog.svg")),
     purescript:    (name: "PureScript",       color: rgb("#111419"), icon: __icon("purescript.svg")),
     python:        (name: "Python",           color: rgb("#efda54"), icon: __icon("python.svg")),
+      py:          (name: "Python",           color: rgb("#efda54"), icon: __icon("python.svg")),
     r:             (name: "R",                color: rgb("#284a8e"), icon: __icon("r.svg")),
     rails:         (name: "Rails",            color: rgb("#cc0000"), icon: __icon("rails.svg")),
     ruby:          (name: "Ruby",             color: rgb("#742013"), icon: __icon("ruby.svg")),
+      rb:          (name: "Ruby",             color: rgb("#742013"), icon: __icon("ruby.svg")),
     rust:          (name: "Rust",             color: rgb("#de5420"), icon: __icon("rust.svg")),
+      rs:          (name: "Rust",             color: rgb("#de5420"), icon: __icon("rust.svg")),
     sass:          (name: "SCSS/Sass",        color: rgb("#cb6699"), icon: __icon("sass.svg")),
+      scss:        (name: "SCSS/Sass",        color: rgb("#cb6699"), icon: __icon("sass.svg")),
     scala:         (name: "Scala",            color: rgb("#390d09"), icon: __icon("scala.svg")),
+      sc:          (name: "Scala",            color: rgb("#390d09"), icon: __icon("scala.svg")),
     shellscript:   (name: "Shell",            color: rgb("#293138"), icon: __icon("bash.svg")),
+      bash:        (name: "Shell",            color: rgb("#293138"), icon: __icon("bash.svg")),
+      sh:          (name: "Shell",            color: rgb("#293138"), icon: __icon("bash.svg")),
+      shell:       (name: "Shell",            color: rgb("#293138"), icon: __icon("bash.svg")),
     solidity:      (name: "Solidity",         color: rgb("#000000"), icon: __icon("solidity.svg")),
+      sol:         (name: "Solidity",         color: rgb("#000000"), icon: __icon("solidity.svg")),
     sql:           (name: "SQL",              color: rgb("#f2f2f2"), icon: __icon("sql.svg")),
     sqlite:        (name: "SQLite",           color: rgb("#0b7fcc"), icon: __icon("sqlite.svg")),
     ssh-config:    (name: "SSH",              color: rgb("#231f20"), icon: __icon("ssh.svg")),
+      ssh:         (name: "SSH",              color: rgb("#231f20"), icon: __icon("ssh.svg")),
     stylus:        (name: "Stylus",           color: rgb("#333333"), icon: __icon("stylus.svg")),
+      styl:        (name: "Stylus",           color: rgb("#333333"), icon: __icon("stylus.svg")),
     svelte:        (name: "Svelte",           color: rgb("#ff3e00"), icon: __icon("svelte.svg")),
     swift:         (name: "Swift",            color: rgb("#f05138"), icon: __icon("swift.svg")),
     terraform:     (name: "Terraform",        color: rgb("#5c4ee5"), icon: __icon("terraform.svg")),
+      tf:          (name: "Terraform",        color: rgb("#5c4ee5"), icon: __icon("terraform.svg")),
     tex:           (name: "TeX",              color: rgb("#000000"), icon: __icon("tex.svg")),
     text:          (name: "Text",             color: rgb("#4579F9"), icon: __icon("text.svg")),
+      txt:         (name: "Text",             color: rgb("#4579F9"), icon: __icon("text.svg")),
     typescript:    (name: "TypeScript",       color: rgb("#ffffff"), icon: __icon("typescript.svg")),
+    ts:            (name: "TypeScript",       color: rgb("#ffffff"), icon: __icon("typescript.svg")),
     typst:         (name: "Typst",            color: rgb("#458fa0"), icon: __icon("typst-small.png")),
+      typ:         (name: "Typst",            color: rgb("#458fa0"), icon: __icon("typst-small.png")),
+      typc:        (name: "Typst",            color: rgb("#458fa0"), icon: __icon("typst-small.png")),
+      typm:        (name: "Typst",            color: rgb("#458fa0"), icon: __icon("typst-small.png")),
     uml:           (name: "UML",              color: rgb("#fbbd16"), icon: __icon("unifiedmodelinglanguage.svg")),
     vala:          (name: "Vala",             color: rgb("#6034a5"), icon: __icon("vala.svg")),
     vim:           (name: "Vim",              color: rgb("#019833"), icon: __icon("vim.svg")),
+      vimscript:   (name: "Vim",              color: rgb("#019833"), icon: __icon("vim.svg")),
     visualbasic:   (name: "Visual Basic",     color: rgb("#004e8c"), icon: __icon("visualbasic.svg")),
+      vb:          (name: "Visual Basic",     color: rgb("#004e8c"), icon: __icon("visualbasic.svg")),
     vyper:         (name: "Vyper",            color: rgb("#000000"), icon: __icon("vyper.svg")),
     wasm:          (name: "WASM",             color: rgb("#654ff0"), icon: __icon("wasm.svg")),
     xml:           (name: "XML",              color: rgb("#ae007f"), icon: __icon("xml.svg")),
     yaml:          (name: "YAML",             color: rgb("#cb171e"), icon: __icon("yaml.svg")),
+      yml:         (name: "YAML",             color: rgb("#cb171e"), icon: __icon("yaml.svg")),
     zig:           (name: "Zig",              color: rgb("#f7a41d"), icon: __icon("zig.svg")),
   )
-
-  // add aliases for our languages (e.g. so both "```typ" and "```typst" work)
-  let aliases = (
-    aarch64:       ("arm"),
-    clojure:       ("clj"),
-    clojurescript: ("cljs"),
-    coffeescript:  ("coffee"),
-    cplusplus:     ("cpp", "cxx", "c++"),
-    csharp:        ("cs", "c#"),
-    docker:        ("dockerfile"),
-    elixir:        ("ex"),
-    erlang:        ("erl"),
-    fsharp:        ("fs", "f#"),
-    go:            ("golang"),
-    haskell:       ("hs"),
-    javascript:    ("js"),
-    julia:         ("jl"),
-    kotlin:        ("kt"),
-    neovim:        ("nvim"),
-    objectivec:    ("objc", "obj-c"),
-    ocaml:         ("ml"),
-    perl:          ("pl"),
-    powershell:    ("ps1"),
-    python:        ("py"),
-    ruby:          ("rb"),
-    rust:          ("rs"),
-    sass:          ("scss"),
-    scala:         ("sc"),
-    shellscript:   ("bash", "shell", "sh"),
-    solidity:      ("sol"),
-    ssh-config:    ("ssh"),
-    stylus:        ("styl"),
-    terraform:     ("tf"),
-    text:          ("txt"),
-    typescript:    ("ts"),
-    typst:         ("typ", "typc", "typm"),
-    vim:           ("vimscript"),
-    visualbasic:   ("vb"),
-    yaml:          ("yml")
-  )
-  for (lang, aliases) in aliases {
-    for alias in aliases {
-      base-languages.insert(alias, base-languages.at(lang))
-    }
-  }
-
-  // finished
-  base-languages
 }
diff --git a/preview/codly-languages/tests/basic-output/ref/1.png b/preview/codly-languages/tests/basic-output/ref/1.png
new file mode 100644
index 0000000..92a6adc
Binary files /dev/null and b/preview/codly-languages/tests/basic-output/ref/1.png differ
diff --git a/preview/codly-languages/tests/basic-output/test.typ b/preview/codly-languages/tests/basic-output/test.typ
new file mode 100644
index 0000000..fe3b50b
--- /dev/null
+++ b/preview/codly-languages/tests/basic-output/test.typ
@@ -0,0 +1,71 @@
+#import "/lib.typ": *
+#import "@preview/codly:1.0.0": *
+#show: codly-init
+#codly(languages: codly-languages)
+
+```python
+print("Hello, World!")
+```
+
+```java
+public class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("Hello, World!");
+    }
+}
+```
+
+```js
+console.log("Hello, World!");
+```
+
+```cpp
+#include <iostream>
+
+int main() {
+    std::cout << "Hello, World!" << std::endl;
+    return 0;
+}
+```
+
+```rust
+fn main() {
+    println!("Hello, World!");
+}
+```
+
+```cs
+using System;
+
+class Program {
+    static void Main() {
+        Console.WriteLine("Hello, World!");
+    }
+}
+```
+
+```go
+package main
+
+import "fmt"
+
+func main() {
+    fmt.Println("Hello, World!")
+}
+```
+
+```swift
+print("Hello, World!")
+```
+
+```php
+<?php
+  echo "Hello, World!";
+?>
+```
+
+```kotlin
+fun main() {
+    println("Hello, World!")
+}
+```
diff --git a/preview/codly-languages/tests/data-check/ref/1.png b/preview/codly-languages/tests/data-check/ref/1.png
new file mode 100644
index 0000000..3575716
Binary files /dev/null and b/preview/codly-languages/tests/data-check/ref/1.png differ
diff --git a/preview/codly-languages/tests/data-check/test.typ b/preview/codly-languages/tests/data-check/test.typ
new file mode 100644
index 0000000..eda3e4b
--- /dev/null
+++ b/preview/codly-languages/tests/data-check/test.typ
@@ -0,0 +1,160 @@
+#import "/lib.typ": *
+
+#let base-languages = (
+  "aarch64",
+  "angular",
+  "ansible",
+  "apache",
+  "apl",
+  "awk",
+  "bash",
+  "c",
+  "cairo",
+  "clojure",
+  "clojurescript",
+  "cmake",
+  "coffeescript",
+  "cplusplus",
+  "crystal",
+  "csharp",
+  "css",
+  "dart",
+  "docker",
+  "elixir",
+  "elm",
+  "emacs",
+  "erlang",
+  "fortran",
+  "fsharp",
+  "git",
+  "go",
+  "graphql",
+  "groovy",
+  "grpc",
+  "handlebars",
+  "haskell",
+  "haxe",
+  "html",
+  "java",
+  "javascript",
+  "json",
+  "julia",
+  "kotlin",
+  "latex",
+  "less",
+  "lua",
+  "markdown",
+  "matlab",
+  "mysql",
+  "neovim",
+  "nginx",
+  "nim",
+  "nix",
+  "objectivec",
+  "ocaml",
+  "perl",
+  "php",
+  "postgresql",
+  "powershell",
+  "processing",
+  "prolog",
+  "purescript",
+  "python",
+  "r",
+  "rails",
+  "ruby",
+  "rust",
+  "sass",
+  "scala",
+  "solidity",
+  "sql",
+  "sqlite",
+  "ssh-config",
+  "stylus",
+  "svelte",
+  "swift",
+  "terraform",
+  "tex",
+  "text",
+  "typescript",
+  "typst",
+  "uml",
+  "vala",
+  "vim",
+  "visualbasic",
+  "vyper",
+  "wasm",
+  "xml",
+  "yaml",
+  "zig",
+)
+
+#for lang in base-languages {
+  if lang not in codly-languages.keys() {
+    panic("warning: language " + lang + " not found in codly-languages")
+  }
+}
+
+Found all base languages!
+
+
+#let aliases = (
+  "arm",
+  "bash",
+  "clj",
+  "cljs",
+  "coffee",
+  "cpp",
+  "cs",
+  "cxx",
+  "dockerfile",
+  "erl",
+  "ex",
+  "fs",
+  "golang",
+  "hs",
+  "html5",
+  "jl",
+  "js",
+  "kt",
+  "ml",
+  "nixos",
+  "nvim",
+  "obj-c",
+  "objc",
+  "pl",
+  "ps1",
+  "py",
+  "rb",
+  "rs",
+  "sc",
+  "scss",
+  "sh",
+  "shell",
+  "sol",
+  "ssh",
+  "styl",
+  "tf",
+  "ts",
+  "txt",
+  "typ",
+  "typc",
+  "typm",
+  "vb",
+  "vimscript",
+  "yml"
+)
+
+#for lang in aliases {
+  if lang not in codly-languages.keys() {
+    panic("error: language " + lang + " not found in codly-languages")
+  }
+}
+
+Found all language aliases!
+
+#if codly-languages.keys().len() != base-languages.len() + aliases.len() {
+    panic("error: language count is incorrect")
+}
+
+Language key count matches: #codly-languages.keys().len() keys.
diff --git a/preview/codly-languages/typst.toml b/preview/codly-languages/typst.toml
index d13ebb5..d3a66f4 100644
--- a/preview/codly-languages/typst.toml
+++ b/preview/codly-languages/typst.toml
@@ -1,10 +1,10 @@
 [package]
 name = "codly-languages"
-version = "0.1.1"
+version = "0.1.2"
 entrypoint = "lib.typ"
 authors = ["Stephen Waits <steve@waits.net>"]
 license = "MIT"
 description = "A set of language configurations for use with codly"
-keywords = [ "code", "languages", "template", "raw" ]
+keywords = ["code", "languages", "template", "raw"]
 repository = "https://github.com/swaits/typst-collection"
-exclude = ["thumbnail.png"]
+exclude = ["thumbnail.png", "tests"]