diff --git a/docs/manual/release-notes/rl-0.9.md b/docs/manual/release-notes/rl-0.9.md
index 5415d936..a6e5dfd6 100644
--- a/docs/manual/release-notes/rl-0.9.md
+++ b/docs/manual/release-notes/rl-0.9.md
@@ -229,6 +229,9 @@
 
 [Snoweuph](https://github.com/snoweuph)
 
+- Fix `tressiter` to allow `null` in grammar options, so they can be filtered
+  out.
+
 - Added [Selenen](https://github.com/kampfkarren/selene) for more diagnostics in
   `languages.lua`.
 
@@ -304,6 +307,8 @@
 
 - Added `languages.jq`. Supports highlighting, formatting and lsp.
 
+- Extend `languages.asm` to support more filetypes out of the box.
+
 - Didn't Add
   [`syntax-gaslighting`](https://github.com/NotAShelf/syntax-gaslighting.nvim),
   you're crazy.
diff --git a/modules/plugins/languages/asm.nix b/modules/plugins/languages/asm.nix
index eccc91e7..f1831401 100644
--- a/modules/plugins/languages/asm.nix
+++ b/modules/plugins/languages/asm.nix
@@ -18,7 +18,7 @@
     asm-lsp = {
       enable = true;
       cmd = [(getExe pkgs.asm-lsp)];
-      filetypes = ["asm" "vmasm"];
+      filetypes = ["asm" "nasm" "masm" "vmasm" "fasm" "tasm" "tiasm" "asm68k" "asm8300"];
       root_markers = [".asm-lsp.toml" ".git"];
     };
   };
@@ -33,7 +33,9 @@ in {
           default = config.vim.languages.enableTreesitter;
           defaultText = literalExpression "config.vim.languages.enableTreesitter";
         };
-      package = mkGrammarOption pkgs "asm";
+      packageASM = mkGrammarOption pkgs "asm";
+      packageNASM = mkGrammarOption pkgs "nasm";
+      packageRpiPicoASM = mkGrammarOption pkgs "pioasm";
     };
 
     lsp = {
@@ -53,7 +55,11 @@ in {
   config = mkIf cfg.enable (mkMerge [
     (mkIf cfg.treesitter.enable {
       vim.treesitter.enable = true;
-      vim.treesitter.grammars = [cfg.treesitter.package];
+      vim.treesitter.grammars = [
+        cfg.treesitter.packageASM
+        cfg.treesitter.packageNASM
+        cfg.treesitter.packageRpiPicoASM
+      ];
     })
 
     (mkIf cfg.lsp.enable {
diff --git a/modules/plugins/treesitter/treesitter.nix b/modules/plugins/treesitter/treesitter.nix
index c2039a9f..a25c1d3f 100644
--- a/modules/plugins/treesitter/treesitter.nix
+++ b/modules/plugins/treesitter/treesitter.nix
@@ -4,7 +4,7 @@
   ...
 }: let
   inherit (lib.options) mkOption mkEnableOption literalExpression;
-  inherit (lib.types) listOf package bool;
+  inherit (lib.types) listOf nullOr package bool;
 in {
   options.vim.treesitter = {
     enable = mkEnableOption "treesitter, also enabled automatically through language options";
@@ -13,7 +13,7 @@ in {
     autotagHtml = mkEnableOption "autoclose and rename html tag";
 
     grammars = mkOption {
-      type = listOf package;
+      type = listOf (nullOr package);
       default = [];
       example = literalExpression ''
         with pkgs.vimPlugins.nvim-treesitter.grammarPlugins; [