diff --git a/src/config/ghidraLanguageOverride.ts b/src/config/ghidraLanguageOverride.ts
index 6e1b3d1f7b..70a5ad50eb 100644
--- a/src/config/ghidraLanguageOverride.ts
+++ b/src/config/ghidraLanguageOverride.ts
@@ -13,10 +13,12 @@ export interface GhidraLanguageOverride {
 
 // Ghidra language IDs are four colon-separated fields; variants may contain
 // spaces ("x86:LE:16:Real Mode") but never leading or trailing whitespace.
+// Stock .ldefs also use "/" in processors ("M16C/60") and LEBE for ARM BE8
+// (big-endian data, little-endian instructions).
 export const ghidraLanguageIdSchema = z
   .string()
   .regex(
-    /^[A-Za-z0-9_.+-]+:(?:LE|BE):[1-9]\d*:[A-Za-z0-9_.+-](?:[A-Za-z0-9_.+ -]*[A-Za-z0-9_.+-])?$/u,
+    /^[A-Za-z0-9_.+-]+(?:\/[A-Za-z0-9_.+-]+)*:(?:LE|BE|LEBE):[1-9]\d*:[A-Za-z0-9_.+-](?:[A-Za-z0-9_.+ -]*[A-Za-z0-9_.+-])?$/u,
     "must be a Ghidra language ID such as x86:LE:32:default",
   );
 
diff --git a/src/ghidra/GhidraLanguageOverride.test.ts b/src/ghidra/GhidraLanguageOverride.test.ts
index b00a07d9be..76919a39c2 100644
--- a/src/ghidra/GhidraLanguageOverride.test.ts
+++ b/src/ghidra/GhidraLanguageOverride.test.ts
@@ -156,6 +156,25 @@ describe("Ghidra language override configuration", () => {
     });
   });
 
+  it.each([
+    "ARM:LEBE:32:v8LEInstruction",
+    "ARM:LEBE:32:v7LEInstruction",
+    "M16C/60:LE:16:default",
+    "M16C/80:LE:16:default",
+  ])("accepts the stock Ghidra language ID %s", (languageId) => {
+    const parsed = parseConfig({ REA_GHIDRA_LANGUAGE_ID: languageId });
+    if (!parsed.ok) throw parsed.error;
+    expect(parsed.value.ghidraLanguageOverride).toEqual({ languageId });
+  });
+
+  it.each(["ARM:BELE:32:v8", "/x86:LE:32:default", "x86:LE:32:default "])(
+    "still refuses the malformed language ID %j",
+    (languageId) => {
+      const parsed = parseConfig({ REA_GHIDRA_LANGUAGE_ID: languageId });
+      expect(parsed.ok).toBe(false);
+    },
+  );
+
   it("requires a language for a compiler spec, as analyzeHeadless does", () => {
     const parsed = parseConfig({ REA_GHIDRA_COMPILER_SPEC_ID: "borlandcpp" });
     if (parsed.ok) throw new Error("Expected a configuration error");