diff --git a/L10n/en.template b/L10n/en.template
index 4ccf2c6d..0065c1e7 100644
--- a/L10n/en.template
+++ b/L10n/en.template
@@ -233,6 +233,9 @@
 /* Failures to access Frontier CAPI endpoints [companion.py] */
 "Frontier CAPI query failure" = "Frontier CAPI query failure";
 
+/* Server errors from Frontier CAPI server [companion.py] */
+"Frontier CAPI server error" = "Frontier CAPI server error";
+
 /* CQC rank. [stats.py] */
 "Gladiator" = "Gladiator";
 
diff --git a/companion.py b/companion.py
index 79858b90..953e5fb4 100644
--- a/companion.py
+++ b/companion.py
@@ -556,7 +556,7 @@ class Session(object):
             # Server error. Typically 500 "Internal Server Error" if server is down
             logger.debug('500 status back from CAPI')
             self.dump(r)
-            raise ServerError(f'Received error {r.status_code} from server')
+            raise ServerError(f'{_("Frontier CAPI server error")}: {r.status_code}')
 
         try:
             r.raise_for_status()  # Typically 403 "Forbidden" on token expiry