diff --git a/components/case/summary.js b/components/case/summary.js
index 5c17aa4c..58b5c7b8 100644
--- a/components/case/summary.js
+++ b/components/case/summary.js
@@ -510,8 +510,7 @@ const CaseSummary = (props) => {
                                         href="#case-eia"
                                         onClick={() => setWhichTab("case-eia")}
                                     >
-                                        {" "}
-                                        EIA
+                                        {router.locale == "cy" ? "AEA" : "EIA"}
                                     </a>
                                 </li>
                             )}
diff --git a/locales/cy/case.json b/locales/cy/case.json
index d6b0960b..138b9c4b 100644
--- a/locales/cy/case.json
+++ b/locales/cy/case.json
@@ -155,12 +155,12 @@
     "status-hide-all-label": "Cuddio pob cam",
     "project-type-label": "Math o brosiect",
     "summary-specialist-case-process-label": "Proses Achos Arbenigol",
-    "summary-eia-screening-heading": "Sgrinio EIA",
+    "summary-eia-screening-heading": "Sgrinio AEA",
     "summary-eia-screening-start-date-label": "Dyddiad Dechrau Sgrinio",
     "summary-eia-screening-target-date-label": "Dyddiad Targed Sgrinio",
     "summary-eia-screening-target-extended-label": "Targed Sgrinio wedi'i Estyn",
     "summary-eia-screening-direction-issued-label": "Dyddiad Cyhoeddi Cyfarwyddyd Sgrinio",
-    "summary-eia-scoping-heading": "Cwmpasu EIA",
+    "summary-eia-scoping-heading": "Cwmpasu AEA",
     "summary-eia-scoping-start-date-label": "Dyddiad Dechrau Cwmpasu",
     "summary-eia-scoping-target-date-label": "Dyddiad Targed Cwmpasu",
     "summary-eia-scoping-target-extended-label": "Targed Cwmpasu wedi'i Estyn",