diff --git a/logbook/WorkedBefore.cpp b/logbook/WorkedBefore.cpp
index d6a794108..e7214d41b 100644
--- a/logbook/WorkedBefore.cpp
+++ b/logbook/WorkedBefore.cpp
@@ -8,6 +8,7 @@
 #include <boost/multi_index/ordered_index.hpp>
 #include <boost/multi_index/key_extractors.hpp>
 #include <boost/range/iterator_range.hpp>
+#include <QCoreApplication>
 #include <QtConcurrent/QtConcurrentRun>
 #include <QFuture>
 #include <QFutureWatcher>
@@ -254,7 +255,7 @@ namespace
           }
         else
           {
-            throw LoaderException (std::runtime_error {"Invalid ADIF field " + fieldName.toStdString () + ": " + record.toStdString ()});
+            throw LoaderException (std::runtime_error {QCoreApplication::translate ("WorkedBefore", "Invalid ADIF field %0: %1").arg (fieldName).arg (record).toLocal8Bit ()});
           }
 
         if (closingBracketIndex > fieldNameIndex && fieldLengthIndex > fieldNameIndex && fieldLengthIndex < closingBracketIndex)
@@ -271,7 +272,7 @@ namespace
           }
         else
           {
-            throw LoaderException (std::runtime_error {"Malformed ADIF field " + fieldName.toStdString () + ": " + record.toStdString ()});
+            throw LoaderException (std::runtime_error {QCoreApplication::translate ("WorkedBefore", "Malformed ADIF field %0: %1").arg (fieldName).arg (record).toLocal8Bit ()});
           }
       }
     return QString {};
@@ -308,7 +309,7 @@ namespace
               {
                 if (end_position < 0)
                   {
-                    throw LoaderException (std::runtime_error {"Invalid ADIF header"});
+                    throw LoaderException (std::runtime_error {QCoreApplication::translate ("WorkedBefore", "Invalid ADIF header").toLocal8Bit ()});
                   }
                 buffer.remove (0, end_position + 5);
               }
@@ -354,7 +355,7 @@ namespace
           }
         else
           {
-            throw LoaderException (std::runtime_error {"Error opening ADIF log file for read: " + inputFile.errorString ().toStdString ()});
+            throw LoaderException (std::runtime_error {QCoreApplication::translate ("WorkedBefore", "Error opening ADIF log file for read: %0").arg (inputFile.errorString ()).toLocal8Bit ()});
           }
       }
     return worked;