diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index dbde1fd01d..71cd847e72 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -3507,6 +3507,8 @@ JSON:
   - ".jsonl"
   - ".mcmeta"
   - ".sarif"
+  - ".slnlaunch"
+  - ".slnLaunch"
   - ".tact"
   - ".tfstate"
   - ".tfstate.backup"