diff --git a/crates/lsh/definitions/cpp.lsh b/crates/lsh/definitions/cpp.lsh
index d6f1231004d..19f139f4964 100644
--- a/crates/lsh/definitions/cpp.lsh
+++ b/crates/lsh/definitions/cpp.lsh
@@ -4,6 +4,9 @@
 #[path = "**/*.cxx"]
 #[path = "**/*.hpp"]
 #[path = "**/*.h"]
+#[path = "**/*.hh"]
+#[path = "**/*.hxx"]
+#[path = "**/*.ixx"]
 pub fn cpp() {
     until /$/ {
         yield other;
diff --git a/crates/lsh/definitions/fsharp.lsh b/crates/lsh/definitions/fsharp.lsh
index 4e34e5ec66e..6ec32ab4531 100644
--- a/crates/lsh/definitions/fsharp.lsh
+++ b/crates/lsh/definitions/fsharp.lsh
@@ -2,6 +2,7 @@
 #[path = "**/*.fs"]
 #[path = "**/*.fsi"]
 #[path = "**/*.fsx"]
+#[path = "**/*.fsscript"]
 pub fn fsharp() {
     // Compiler and script directives always occupy the entire line.
     if /\s*#(?:if|else|endif|light|line|load|nowarn|time|help|quit|r|I)\>.*/ {
diff --git a/crates/lsh/definitions/json.lsh b/crates/lsh/definitions/json.lsh
index 6b8f296b441..b4ea53ed85f 100644
--- a/crates/lsh/definitions/json.lsh
+++ b/crates/lsh/definitions/json.lsh
@@ -1,6 +1,8 @@
 #[display_name = "JSON"]
 #[path = "**/*.json"]
 #[path = "**/*.jsonc"]
+#[path = "**/*.jsonl"]
+#[path = "**/*.ndjson"]
 pub fn json() {
     until /$/ {
         yield other;
diff --git a/crates/lsh/definitions/markdown.lsh b/crates/lsh/definitions/markdown.lsh
index 2a8643406d0..b3f87ec2859 100644
--- a/crates/lsh/definitions/markdown.lsh
+++ b/crates/lsh/definitions/markdown.lsh
@@ -1,5 +1,6 @@
 #[display_name = "Markdown"]
 #[path = "**/*.md"]
+#[path = "**/*.markdown"]
 pub fn markdown() {
     // Any lines that start with a tab or 4+ spaces are code blocks.
     if /(?:\t|    ).*/ {
diff --git a/crates/lsh/definitions/xml.lsh b/crates/lsh/definitions/xml.lsh
index 988273c9165..54a20cfa493 100644
--- a/crates/lsh/definitions/xml.lsh
+++ b/crates/lsh/definitions/xml.lsh
@@ -13,7 +13,7 @@
 #[path = "**/*.vcxproj"]
 #[path = "**/*.xaml"]
 #[path = "**/*.xml"]
-#[path = "**/*.xml"]
+#[path = "**/*.xhtml"]
 pub fn xml() {
     until /$/ {
         yield other;