diff --git a/interface/wx/translation.h b/interface/wx/translation.h
index a57c9930d0..fd39fd6b18 100644
--- a/interface/wx/translation.h
+++ b/interface/wx/translation.h
@@ -190,9 +190,10 @@ public:
     bool AddStdCatalog();
 
     /**
-        Add a catalog for use with the current locale.
+        Add a catalog for the preferred UI language. In case of multiple
+        preferences, add catalog for each language, if available.
 
-        By default, it is searched for in standard places (see
+        By default, the catalog is searched for in standard places (see
         wxFileTranslationsLoader), but you may also prepend additional
         directories to the search path with
         wxFileTranslationsLoader::AddCatalogLookupPathPrefix().
@@ -216,8 +217,9 @@ public:
             code are used instead.
 
         @return
-            @true if catalog was successfully loaded, @false otherwise (which might
-            mean that the catalog is not found or that it isn't in the correct format).
+            @true if catalog in the most preferred language was successfully loaded,
+            @false otherwise (which might mean that the catalog is not found or that
+            it isn't in the correct format).
      */
     bool AddCatalog(const wxString& domain,
                     wxLanguage msgIdLanguage = wxLANGUAGE_ENGLISH_US);
@@ -243,8 +245,9 @@ public:
             in case they use 8-bit characters (e.g. German or French strings).
 
         @return
-            @true if catalog was successfully loaded, @false otherwise (which might
-            mean that the catalog is not found or that it isn't in the correct format).
+            @true if catalog in the most preferred language was successfully loaded,
+            @false otherwise (which might mean that the catalog is not found or that
+            it isn't in the correct format).
      */
     bool AddCatalog(const wxString& domain,
                     wxLanguage msgIdLanguage,
diff --git a/src/common/translation.cpp b/src/common/translation.cpp
index a64327eaef..377dc533f1 100644
--- a/src/common/translation.cpp
+++ b/src/common/translation.cpp
@@ -1555,9 +1555,9 @@ bool wxTranslations::AddCatalog(const wxString& domain,
                                 wxLanguage msgIdLanguage)
 {
     const wxString msgIdLang = wxLocale::GetLanguageCanonicalName(msgIdLanguage);
-    const wxString domain_lang = GetBestTranslation(domain, msgIdLang);
+    const wxArrayString domain_langs = GetAllGoodTranslations(domain, msgIdLanguage);
 
-    if ( domain_lang.empty() )
+    if ( domain_langs.empty() )
     {
         wxLogTrace(TRACE_I18N,
                     wxS("no suitable translation for domain '%s' found"),
@@ -1565,11 +1565,30 @@ bool wxTranslations::AddCatalog(const wxString& domain,
         return false;
     }
 
-    wxLogTrace(TRACE_I18N,
-                wxS("adding '%s' translation for domain '%s' (msgid language '%s')"),
-                domain_lang, domain, msgIdLang);
+    bool success = false;
+    for ( wxArrayString::const_iterator lang = domain_langs.begin();
+          lang != domain_langs.end();
+          ++lang )
+    {
+        wxLogTrace(TRACE_I18N,
+                   wxS("adding '%s' translation for domain '%s' (msgid language '%s')"),
+                   *lang, domain, msgIdLang);
 
-    return LoadCatalog(domain, domain_lang, msgIdLang);
+        // No use loading languages that are less preferred than the
+        // msgid language, as by definition it contains all the strings
+        // in the msgid language.
+        if ( msgIdLang == *lang )
+            break;
+
+        // We determine success by the success of loading/failing to load
+        // the most preferred (i.e. the first one) language's catalog:
+        if ( lang == domain_langs.begin() )
+            success = LoadCatalog(domain, *lang, msgIdLang);
+        else
+            LoadCatalog(domain, *lang, msgIdLang);
+    }
+
+    return success;
 }