diff --git a/doc/Localization_guide.md b/doc/Localization_guide.md
index 3394d2958..abf898cb8 100644
--- a/doc/Localization_guide.md
+++ b/doc/Localization_guide.md
@@ -36,7 +36,7 @@ Each string resource in Slic3rPE available for translation needs to be explicitl
 ```C++
 auto msg = L("This message to be localized")
 ```
-To get translated text use one of needed macro/function (`_(s)`, `_CHB(s)` or `L_str(s)` ).
+To get translated text use one of needed macro/function (`_(s)` or `_CHB(s)` ).
 If you add new file resource, add it to the list of files containing macro `L()`
 
 ### Scenario 4. How do I use GNUgettext to localize my own application taking Slic3rPE as an example
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 307b0af59..8619bec1c 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -3035,10 +3035,10 @@ void GLCanvas3D::set_tooltip(const std::string& tooltip) const
             if (tooltip.empty())
                 m_canvas->UnsetToolTip();
             else
-                t->SetTip(tooltip);
+                t->SetTip(wxString::FromUTF8(tooltip.data()));
         }
         else if (!tooltip.empty()) // Avoid "empty" tooltips => unset of the empty tooltip leads to application crash under OSX
-            m_canvas->SetToolTip(tooltip);
+            m_canvas->SetToolTip(wxString::FromUTF8(tooltip.data()));
     }
 }
 
@@ -3389,7 +3389,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "add.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Add...") + " [" + GUI::shortkey_ctrl_prefix() + "I]";
+    item.tooltip = _utf8(L("Add...")) + " [" + GUI::shortkey_ctrl_prefix() + "I]";
     item.sprite_id = 0;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_ADD)); };
     if (!m_toolbar.add_item(item))
@@ -3399,7 +3399,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "remove.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Delete") + " [Del]";
+    item.tooltip = _utf8(L("Delete")) + " [Del]";
     item.sprite_id = 1;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_DELETE)); };
     item.enabled_state_callback = []()->bool { return wxGetApp().plater()->can_delete(); };
@@ -3410,7 +3410,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "delete_all.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Delete all") + " [" + GUI::shortkey_ctrl_prefix() + "Del]";
+    item.tooltip = _utf8(L("Delete all")) + " [" + GUI::shortkey_ctrl_prefix() + "Del]";
     item.sprite_id = 2;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_DELETE_ALL)); };
     item.enabled_state_callback = []()->bool { return wxGetApp().plater()->can_delete_all(); };
@@ -3421,7 +3421,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "arrange.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Arrange [A]");
+    item.tooltip = _utf8(L("Arrange")) + " [A]";
     item.sprite_id = 3;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_ARRANGE)); };
     item.enabled_state_callback = []()->bool { return wxGetApp().plater()->can_arrange(); };
@@ -3435,7 +3435,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "copy.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Copy") + " [" + GUI::shortkey_ctrl_prefix() + "C]";
+    item.tooltip = _utf8(L("Copy")) + " [" + GUI::shortkey_ctrl_prefix() + "C]";
     item.sprite_id = 4;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_COPY)); };
     item.enabled_state_callback = []()->bool { return wxGetApp().plater()->can_copy(); };
@@ -3446,7 +3446,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "paste.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Paste") + " [" + GUI::shortkey_ctrl_prefix() + "V]";
+    item.tooltip = _utf8(L("Paste")) + " [" + GUI::shortkey_ctrl_prefix() + "V]";
     item.sprite_id = 5;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_PASTE)); };
     item.enabled_state_callback = []()->bool { return wxGetApp().plater()->can_paste(); };
@@ -3460,7 +3460,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "instance_add.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Add instance [+]");
+    item.tooltip = _utf8(L("Add instance")) + " [+]";
     item.sprite_id = 6;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_MORE)); };
     item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
@@ -3472,7 +3472,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "instance_remove.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Remove instance [-]");
+    item.tooltip = _utf8(L("Remove instance")) + " [-]";
     item.sprite_id = 7;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_FEWER)); };
     item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
@@ -3487,7 +3487,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "split_objects.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Split to objects");
+    item.tooltip = _utf8(L("Split to objects"));
     item.sprite_id = 8;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_SPLIT_OBJECTS)); };
     item.visibility_callback = GLToolbarItem::Default_Visibility_Callback;
@@ -3499,7 +3499,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "split_parts.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Split to parts");
+    item.tooltip = _utf8(L("Split to parts"));
     item.sprite_id = 9;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_SPLIT_VOLUMES)); };
     item.visibility_callback = []()->bool { return wxGetApp().get_mode() != comSimple; };
@@ -3514,7 +3514,7 @@ bool GLCanvas3D::_init_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "layers_white.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Layers editing");
+    item.tooltip = _utf8(L("Layers editing"));
     item.sprite_id = 10;
     item.is_toggable = true;
     item.action_callback = [this]() { if (m_canvas != nullptr) wxPostEvent(m_canvas, SimpleEvent(EVT_GLTOOLBAR_LAYERSEDITING)); };
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp b/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
index cabede8cd..8934bc52b 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
@@ -85,7 +85,7 @@ bool GLGizmoCut::on_init()
 
 std::string GLGizmoCut::on_get_name() const
 {
-    return L("Cut [C]");
+    return (_(L("Cut")) + " [C]").ToUTF8().data();
 }
 
 void GLGizmoCut::on_set_state()
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp b/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
index 56dbf4f54..ec991a241 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
@@ -29,7 +29,7 @@ bool GLGizmoFlatten::on_init()
 
 std::string GLGizmoFlatten::on_get_name() const
 {
-    return L("Place on face [F]");
+    return (_(L("Place on face")) + " [F]").ToUTF8().data();
 }
 
 bool GLGizmoFlatten::on_is_activable(const Selection& selection) const
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoMove.cpp b/src/slic3r/GUI/Gizmos/GLGizmoMove.cpp
index 346bf5b06..c8925ad60 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoMove.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoMove.cpp
@@ -48,7 +48,7 @@ bool GLGizmoMove3D::on_init()
 
 std::string GLGizmoMove3D::on_get_name() const
 {
-    return L("Move [M]");
+    return (_(L("Move")) + " [M]").ToUTF8().data();
 }
 
 void GLGizmoMove3D::on_start_dragging(const Selection& selection)
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp b/src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp
index ff9cf380e..68b9a8c33 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp
@@ -455,7 +455,7 @@ bool GLGizmoRotate3D::on_init()
 
 std::string GLGizmoRotate3D::on_get_name() const
 {
-    return L("Rotate [R]");
+    return (_(L("Rotate")) + " [R]").ToUTF8().data();
 }
 
 void GLGizmoRotate3D::on_start_dragging(const Selection& selection)
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoScale.cpp b/src/slic3r/GUI/Gizmos/GLGizmoScale.cpp
index a4f396934..30b60d372 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoScale.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoScale.cpp
@@ -48,7 +48,7 @@ bool GLGizmoScale3D::on_init()
 
 std::string GLGizmoScale3D::on_get_name() const
 {
-    return L("Scale [S]");
+    return (_(L("Scale")) + " [S]").ToUTF8().data();
 }
 
 void GLGizmoScale3D::on_start_dragging(const Selection& selection)
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
index 1400bef5e..b2b7c9872 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
@@ -994,7 +994,7 @@ bool GLGizmoSlaSupports::on_is_selectable() const
 
 std::string GLGizmoSlaSupports::on_get_name() const
 {
-    return L("SLA Support Points [L]");
+    return (_(L("SLA Support Points")) + " [L]").ToUTF8().data();
 }
 
 void GLGizmoSlaSupports::on_set_state()
diff --git a/src/slic3r/GUI/I18N.hpp b/src/slic3r/GUI/I18N.hpp
index a899eaa59..cf85f7410 100644
--- a/src/slic3r/GUI/I18N.hpp
+++ b/src/slic3r/GUI/I18N.hpp
@@ -1,9 +1,11 @@
 #ifndef _
 #define _(s)    Slic3r::GUI::I18N::translate((s))
+#define _utf8(s)    Slic3r::GUI::I18N::translate_utf8((s))
 #endif /* _ */
 
 #ifndef _CTX
 #define _CTX(s, ctx) Slic3r::GUI::I18N::translate((s), (ctx))
+#define _CTX_utf8(s, ctx) Slic3r::GUI::I18N::translate_utf8((s), (ctx))
 #endif /* _ */
 
 #ifndef L
@@ -35,6 +37,11 @@ namespace I18N {
 	inline wxString translate(const std::string &s)  { return wxGetTranslation(wxString(s.c_str(), wxConvUTF8)); }
 	inline wxString translate(const std::wstring &s) { return wxGetTranslation(s.c_str()); }
 
+	inline std::string translate_utf8(const char *s)    	 { return wxGetTranslation(wxString(s, wxConvUTF8)).ToUTF8().data(); }
+	inline std::string translate_utf8(const wchar_t *s) 	 { return wxGetTranslation(s).ToUTF8().data(); }
+	inline std::string translate_utf8(const std::string &s)  { return wxGetTranslation(wxString(s.c_str(), wxConvUTF8)).ToUTF8().data(); }
+	inline std::string translate_utf8(const std::wstring &s) { return wxGetTranslation(s.c_str()).ToUTF8().data(); }
+
 #if wxCHECK_VERSION(3, 1, 1)
 	#define _wxGetTranslation_ctx(S, CTX) wxGetTranslation((S), wxEmptyString, (CTX))
 #else
@@ -46,6 +53,11 @@ namespace I18N {
 	inline wxString translate(const std::string &s, const char* ctx)  { return _wxGetTranslation_ctx(wxString(s.c_str(), wxConvUTF8), ctx); }
 	inline wxString translate(const std::wstring &s, const char* ctx) { return _wxGetTranslation_ctx(s.c_str(), ctx); }
 
+	inline wxString translate_utf8(const char *s, const char* ctx)         { return _wxGetTranslation_ctx(wxString(s, wxConvUTF8), ctx).ToUTF8().data(); }
+	inline wxString translate_utf8(const wchar_t *s, const char* ctx)      { return _wxGetTranslation_ctx(s, ctx).ToUTF8().data(); }
+	inline wxString translate_utf8(const std::string &s, const char* ctx)  { return _wxGetTranslation_ctx(wxString(s.c_str(), wxConvUTF8), ctx).ToUTF8().data(); }
+	inline wxString translate_utf8(const std::wstring &s, const char* ctx) { return _wxGetTranslation_ctx(s.c_str(), ctx).ToUTF8().data(); }
+
 #undef _wxGetTranslation_ctx
 }
 
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 022cb2e9d..f5b4a6545 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -685,11 +685,11 @@ Sidebar::Sidebar(Plater *parent)
     };
 
     p->combos_filament.push_back(nullptr);
-    init_combo(&p->combo_print,         _(L("Print settings")), Preset::TYPE_PRINT,         false);
-    init_combo(&p->combos_filament[0],  _(L("Filament")),       Preset::TYPE_FILAMENT,      true);
-    init_combo(&p->combo_sla_print,     _(L("SLA print")),      Preset::TYPE_SLA_PRINT,     false);
-    init_combo(&p->combo_sla_material,  _(L("SLA material")),   Preset::TYPE_SLA_MATERIAL,  false);
-    init_combo(&p->combo_printer,       _(L("Printer")),        Preset::TYPE_PRINTER,       false);
+    init_combo(&p->combo_print,         _(L("Print settings")),     Preset::TYPE_PRINT,         false);
+    init_combo(&p->combos_filament[0],  _(L("Filament")),           Preset::TYPE_FILAMENT,      true);
+    init_combo(&p->combo_sla_print,     _(L("SLA print settings")), Preset::TYPE_SLA_PRINT,     false);
+    init_combo(&p->combo_sla_material,  _(L("SLA material")),       Preset::TYPE_SLA_MATERIAL,  false);
+    init_combo(&p->combo_printer,       _(L("Printer")),            Preset::TYPE_PRINTER,       false);
 
     const int margin_5  = int(0.5*wxGetApp().em_unit());// 5;
     const int margin_10 = 10;//int(1.5*wxGetApp().em_unit());// 15;
@@ -3071,7 +3071,7 @@ void Plater::priv::init_view_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "editor.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("3D editor view") + " [" + GUI::shortkey_ctrl_prefix() + "5]";
+    item.tooltip = _utf8(L("3D editor view")) + " [" + GUI::shortkey_ctrl_prefix() + "5]";
     item.sprite_id = 0;
     item.action_callback = [this]() { if (this->q != nullptr) wxPostEvent(this->q, SimpleEvent(EVT_GLVIEWTOOLBAR_3D)); };
     item.is_toggable = false;
@@ -3082,7 +3082,7 @@ void Plater::priv::init_view_toolbar()
 #if ENABLE_SVG_ICONS
     item.icon_filename = "preview.svg";
 #endif // ENABLE_SVG_ICONS
-    item.tooltip = GUI::L_str("Preview") + " [" + GUI::shortkey_ctrl_prefix() + "6]";
+    item.tooltip = _utf8(L("Preview")) + " [" + GUI::shortkey_ctrl_prefix() + "6]";
     item.sprite_id = 1;
     item.action_callback = [this]() { if (this->q != nullptr) wxPostEvent(this->q, SimpleEvent(EVT_GLVIEWTOOLBAR_PREVIEW)); };
     item.is_toggable = false;