diff --git a/claw-skills/SKILL.md b/claw-skills/SKILL.md
index 200d44c..cf6a260 100644
--- a/claw-skills/SKILL.md
+++ b/claw-skills/SKILL.md
@@ -2,6 +2,9 @@
 
 ClawSkills management and collaboration suite — scripts and workflows for using and improving skills.
 
+> **All skill-related documentation must be written in English.**
+> When creating, improving, or correcting skills, always use English for all documentation, descriptions, and guides.
+
 ## Scripts
 
 ### update-skills
diff --git a/claw-skills/workflows/improve-skills.md b/claw-skills/workflows/improve-skills.md
index c84cbae..d8204e2 100644
--- a/claw-skills/workflows/improve-skills.md
+++ b/claw-skills/workflows/improve-skills.md
@@ -10,6 +10,13 @@ Used when a skill or workflow has one of these problems:
 
 Improvement is better than workaround. Fix problems when you find them, so others don't hit the same坑.
 
+## Requirement
+
+**All skill-related documentation must be written in English.** This applies to:
+- Creating new skills or workflows
+- Improving or correcting existing skills
+- Any other documentation within skills
+
 ## Process
 
 ### 1. Identify the Problem