diff --git a/packages/localize/src/tools/src/translate/source_files/es2015_translate_plugin.ts b/packages/localize/src/tools/src/translate/source_files/es2015_translate_plugin.ts
index 5b643fceb5..0f8a9d01cf 100644
--- a/packages/localize/src/tools/src/translate/source_files/es2015_translate_plugin.ts
+++ b/packages/localize/src/tools/src/translate/source_files/es2015_translate_plugin.ts
@@ -35,6 +35,8 @@ export function makeEs2015TranslatePlugin(
             // since there must be something wrong with the structure of the AST generated
             // by Babel parsing a TaggedTemplateExpression.
             throw buildCodeFrameError(path, e);
+          } else {
+            throw e;
           }
         }
       }
diff --git a/packages/localize/src/tools/src/translate/source_files/es5_translate_plugin.ts b/packages/localize/src/tools/src/translate/source_files/es5_translate_plugin.ts
index e73aa40b43..32db7e890a 100644
--- a/packages/localize/src/tools/src/translate/source_files/es5_translate_plugin.ts
+++ b/packages/localize/src/tools/src/translate/source_files/es5_translate_plugin.ts
@@ -32,6 +32,8 @@ export function makeEs5TranslatePlugin(
         } catch (e) {
           if (isBabelParseError(e)) {
             diagnostics.error(buildCodeFrameError(callPath, e));
+          } else {
+            throw e;
           }
         }
       }