diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 02290e83d..1a864917d 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -974,9 +974,36 @@ int GUI_App::extruders_edited_cnt() const
            preset.config.option<ConfigOptionFloats>("nozzle_diameter")->values.size();
 }
 
+wxString GUI_App::current_language_code_safe() const
+{
+	// Translate the language code to a code, for which Prusa Research maintains translations.
+	wxString language_code = this->current_language_code();
+	size_t   idx_underscore = language_code.find(language_code);
+	if (idx_underscore != wxString::npos)
+		language_code = language_code.substr(0, idx_underscore);
+	const std::map<wxString, wxString> mapping {
+		{ "cs", 	"cs_CZ", },
+		{ "de", 	"de_DE", },
+		{ "es", 	"es_ES", },
+		{ "fr", 	"fr_FR", },
+		{ "it", 	"it_IT", },
+		{ "ja", 	"ja_JP", },
+		{ "ko", 	"ko_KR", },
+		{ "pl", 	"pl_PL", },
+		{ "uk", 	"uk_UA", },
+		{ "zh", 	"zh_CN", },
+	};
+	auto it = mapping.find(language_code);
+	if (it != mapping.end())
+		language_code = it->second;
+	else
+		language_code = "en_US";
+	return language_code;
+}
+
 void GUI_App::open_web_page_localized(const std::string &http_address)
 {
-    wxLaunchDefaultBrowser(http_address + "&lng=" + this->current_language_code());
+    wxLaunchDefaultBrowser(http_address + "&lng=" + this->current_language_code_safe());
 }
 
 void GUI_App::window_pos_save(wxTopLevelWindow* window, const std::string &name)
diff --git a/src/slic3r/GUI/GUI_App.hpp b/src/slic3r/GUI/GUI_App.hpp
index 8d0bcfe2f..5c897a701 100644
--- a/src/slic3r/GUI/GUI_App.hpp
+++ b/src/slic3r/GUI/GUI_App.hpp
@@ -143,7 +143,9 @@ public:
     bool            checked_tab(Tab* tab);
     void            load_current_presets();
 
-    wxString        current_language_code() { return m_wxLocale != nullptr ? m_wxLocale->GetCanonicalName() : wxString("en_US"); }
+    wxString        current_language_code() const { return m_wxLocale != nullptr ? m_wxLocale->GetCanonicalName() : wxString("en_US"); }
+	// Translate the language code to a code, for which Prusa Research maintains translations. Defaults to "en_US".
+    wxString      	current_language_code_safe() const;
 
     virtual bool OnExceptionInMainLoop();
 
diff --git a/src/slic3r/GUI/UpdateDialogs.cpp b/src/slic3r/GUI/UpdateDialogs.cpp
index 0f72b3b35..2ea904007 100644
--- a/src/slic3r/GUI/UpdateDialogs.cpp
+++ b/src/slic3r/GUI/UpdateDialogs.cpp
@@ -55,7 +55,7 @@ MsgUpdateSlic3r::MsgUpdateSlic3r(const Semver &ver_current, const Semver &ver_on
 		auto *link = new wxHyperlinkCtrl(this, wxID_ANY, _(L("Changelog && Download")), url_wx);
 		content_sizer->Add(link);
 	} else {
-		const auto lang_code = wxGetApp().current_language_code().ToStdString();
+		const auto lang_code = wxGetApp().current_language_code_safe().ToStdString();
 
 		const std::string url_log = (boost::format(URL_CHANGELOG) % lang_code).str();
 		const wxString url_log_wx = from_u8(url_log);
@@ -100,7 +100,7 @@ MsgUpdateConfig::MsgUpdateConfig(const std::vector<Update> &updates) :
 	content_sizer->Add(text);
 	content_sizer->AddSpacer(VERT_SPACING);
 
-	const auto lang_code = wxGetApp().current_language_code().ToStdString();
+	const auto lang_code = wxGetApp().current_language_code_safe().ToStdString();
 
 	auto *versions = new wxBoxSizer(wxVERTICAL);
 	for (const auto &update : updates) {