diff --git a/skills/plugin-designer/SKILL.md b/skills/plugin-designer/SKILL.md
index acae4cefa..cd91acb27 100644
--- a/skills/plugin-designer/SKILL.md
+++ b/skills/plugin-designer/SKILL.md
@@ -252,6 +252,7 @@ that genuinely cannot work in a plain web embed — Rudder needs a local speech
 | `references/targets.md` | the five capabilities in full, how they are derived and checked, `targets`, the three outputs |
 | `references/backend.md` | when your plugin needs a service; databases and migrations; the user tiers (design intent, not built) |
 | `references/workflow.md` | the full develop → build → check → land loop |
+| `references/i18n.md` | translating a plugin: whole-sentence keys, label-form counts, inline markup composed (no `<i18n-t>`), deliberate English in `dir="ltr"`, labels that follow a locale switch, the checks to run |
 
 In the repo itself: