diff --git a/src/controllers/api/translate.ts b/src/controllers/api/translate.ts
index 4578c7f..5f229e0 100644
--- a/src/controllers/api/translate.ts
+++ b/src/controllers/api/translate.ts
@@ -133,7 +133,7 @@ const translateController: AppController = async (c) => {
     dittoTranslations.set(translatedId, { data: mastodonTranslation });
     return c.json(mastodonTranslation, 200);
   } catch (e: any) {
-    if (e.message?.includes('not supported') || e.error?.includes('not supported')) {
+    if (e.message?.includes('not supported')) {
       return c.json({ error: `Translation of source language '${event.language}' not supported` }, 422);
     }
     return c.json({ error: 'Service Unavailable' }, 503);
diff --git a/src/translators/DeepLTranslator.ts b/src/translators/DeepLTranslator.ts
index 4307898..5c45790 100644
--- a/src/translators/DeepLTranslator.ts
+++ b/src/translators/DeepLTranslator.ts
@@ -69,7 +69,7 @@ export class DeepLTranslator implements DittoTranslator {
     const response = await this.fetch(request);
     const json = await response.json();
     if (!response.ok) {
-      throw json;
+      throw new Error(json['message']);
     }
     const data = DeepLTranslator.schema().parse(json);
 
diff --git a/src/translators/LibreTranslateTranslator.ts b/src/translators/LibreTranslateTranslator.ts
index 0e6bd55..a7d4eb8 100644
--- a/src/translators/LibreTranslateTranslator.ts
+++ b/src/translators/LibreTranslateTranslator.ts
@@ -69,7 +69,7 @@ export class LibreTranslateTranslator implements DittoTranslator {
     const response = await this.fetch(request);
     const json = await response.json();
     if (!response.ok) {
-      throw json;
+      throw new Error(json['error']);
     }
     const data = LibreTranslateTranslator.schema().parse(json);