diff --git a/src/core/loader.cpp b/src/core/loader.cpp
--- a/src/core/loader.cpp
+++ b/src/core/loader.cpp
@@ -244,12 +244,50 @@
         isoCode = currentDictionary;
     }
 
+    //These iso codes are missing in QLocale
+    QMap<QString, QPair<QString, QString> > missingLocales = {
+        //iso code                                 //lang                         //country             //English name of language
+        {QLatin1String("an"),      {QStringLiteral("aragonés"),          QString()}},          //Aragonese
+        {QLatin1String("an_ES"),   {QStringLiteral("aragonés"),          QStringLiteral("España")}},
+        {QLatin1String("csb"),     {QStringLiteral("kaszëbsczi"),        QString()}},          //Kashubian
+        {QLatin1String("csb_PL"),  {QStringLiteral("kaszëbsczi"),        QStringLiteral("Polska")}},
+        {QLatin1String("cv"),      {QStringLiteral("Чӑвашла"),           QString()}},          //Chuvash
+        {QLatin1String("cv_RU"),   {QStringLiteral("Чӑвашла"),           QStringLiteral("Россия")}},
+        {QLatin1String("grc"),     {QStringLiteral("Αρχαία Ελληνικά"),   QString()}},          //Ancient Greek
+        {QLatin1String("grc_GR"),  {QStringLiteral("Αρχαία Ελληνικά"),   QStringLiteral("Ελλάδα")}},
+        {QLatin1String("gug"),     {QStringLiteral("Guarani"),           QString()}},          //Gurarani
+        {QLatin1String("gug_PY"),  {QStringLiteral("Guarani"),           QStringLiteral("Paraguái")}},
+        {QLatin1String("koi"),     {QStringLiteral("коми"),              QString()}},          //Komi
+        {QLatin1String("koi_RU"),  {QStringLiteral("коми"),              QStringLiteral("Россия")}},
+        {QLatin1String("lb"),      {QStringLiteral("Lëtzebuergesch"),    QString()}},          //Luxembourgish
+        {QLatin1String("lb_LU"),   {QStringLiteral("Lëtzebuergesch"),    QStringLiteral("Lëtzebuerg")}},
+        {QLatin1String("ltg"),     {QStringLiteral("latgalīšu"),         QString()}},          //Latgalian
+        {QLatin1String("ltz"),     {QStringLiteral("Lëtzebuergesch"),    QString()}},          //Luxembourgish
+        {QLatin1String("ltz_LU"),  {QStringLiteral("Lëtzebuergesch"),    QStringLiteral("Lëtzebuerg")}},
+        {QLatin1String("nds"),     {QStringLiteral("Plattdüütsch"),      QString()}},          //Low German / Low Saxon
+        {QLatin1String("pap"),     {QStringLiteral("Papiamentu"),        QString()}},          //Papiamentu
+        {QLatin1String("pap_CW"),  {QStringLiteral("Papiamentu"),        QStringLiteral("Kòrsou")}},
+        {QLatin1String("vec"),     {QStringLiteral("vèneto"),            QString()}},          //Venetian
+        {QLatin1String("vec_IT"),  {QStringLiteral("vèneto"),            QStringLiteral("Italia")}},
+        {QLatin1String("udm"),     {QStringLiteral("удмурт"),            QString()}},          //Udmurt
+        {QLatin1String("udm_RU"),  {QStringLiteral("удмурт"),            QStringLiteral("Россия")}},
+    };
+
     QLocale locale(isoCode);
     localizedCountry = locale.nativeCountryName();
     localizedLang = locale.nativeLanguageName();
 
+    //QLocale didn't have this iso code, try to find in the missingLocales table
     if (localizedLang.isEmpty() && localizedCountry.isEmpty()) {
-        return isoCode;    // We have nothing
+        localizedLang = missingLocales.value(isoCode).first;
+        if (isoCode.length() > 3) {
+            localizedCountry = missingLocales.value(isoCode).second;
+        }
+
+        //still empty, so just return the iso code
+        if (localizedLang.isEmpty() && localizedCountry.isEmpty()) {
+            return isoCode;
+        }
     }
 
     if (!localizedCountry.isEmpty() && !localizedVariant.isEmpty()) { // We have both a country name and a variant