diff --git a/localazy.json b/localazy.json
index 756710942..13422b9d3 100644
--- a/localazy.json
+++ b/localazy.json
@@ -49,11 +49,6 @@
 				"pattern": "bbl/i18n/ja/BambuStudio_ja.po",
 				"lang": "ja"
 			},
-			{
-				"type": "po",
-				"pattern": "bbl/i18n/uk/BambuStudio_uk.po",
-				"lang": "uk"
-			},
 			{
 				"type": "po",
 				"pattern": "bbl/i18n/ja/BambuStudio_ko.po",
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoMeshBoolean.cpp b/src/slic3r/GUI/Gizmos/GLGizmoMeshBoolean.cpp
index 2d7063dab..e7ee32c9f 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoMeshBoolean.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoMeshBoolean.cpp
@@ -179,10 +179,10 @@ void GLGizmoMeshBoolean::on_render_input_window(float x, float y, float bottom_l
     GizmoImguiSetNextWIndowPos(x, y, ImGuiCond_Always, 0.0f, 0.0f);
     GizmoImguiBegin("MeshBoolean", ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoTitleBar);
 
-    const int max_tab_length = 2 * ImGui::GetStyle().FramePadding.x + std::max(ImGui::CalcTextSize(_L("Union").c_str()).x,
-        std::max(ImGui::CalcTextSize(_L("Difference").c_str()).x, ImGui::CalcTextSize(_L("Intersection").c_str()).x));
-    const int max_cap_length = ImGui::GetStyle().WindowPadding.x + ImGui::GetStyle().ItemSpacing.x + std::max(ImGui::CalcTextSize(_L("Source Volume").c_str()).x, ImGui::CalcTextSize(_L("Tool Volume").c_str()).x);
-    const int select_btn_length = 2 * ImGui::GetStyle().FramePadding.x + std::max(ImGui::CalcTextSize(("1 " + _L("selected")).c_str()).x, ImGui::CalcTextSize(_L("Select").c_str()).x);
+    const int max_tab_length = 2 * ImGui::GetStyle().FramePadding.x + std::max(ImGui::CalcTextSize(_u8L("Union").c_str()).x,
+        std::max(ImGui::CalcTextSize(_u8L("Difference").c_str()).x, ImGui::CalcTextSize(_u8L("Intersection").c_str()).x));
+    const int max_cap_length = ImGui::GetStyle().WindowPadding.x + ImGui::GetStyle().ItemSpacing.x + std::max(ImGui::CalcTextSize(_u8L("Source Volume").c_str()).x, ImGui::CalcTextSize(_u8L("Tool Volume").c_str()).x);
+    const int select_btn_length = 2 * ImGui::GetStyle().FramePadding.x + std::max(ImGui::CalcTextSize(("1 " + _u8L("selected")).c_str()).x, ImGui::CalcTextSize(_u8L("Select").c_str()).x);
 
     auto selectable = [this](const wxString& label, bool selected, const ImVec2& size_arg) {
         ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, { 0,0 });
@@ -240,15 +240,15 @@ void GLGizmoMeshBoolean::on_render_input_window(float x, float y, float bottom_l
     };
 
     ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding, 0);
-    if (selectable(_L("Union").c_str(), m_operation_mode == MeshBooleanOperation::Union, ImVec2(max_tab_length, 0.0f))) {
+    if (selectable(_u8L("Union").c_str(), m_operation_mode == MeshBooleanOperation::Union, ImVec2(max_tab_length, 0.0f))) {
         m_operation_mode = MeshBooleanOperation::Union;
     }
     ImGui::SameLine(0, 0);
-    if (selectable(_L("Difference").c_str(), m_operation_mode == MeshBooleanOperation::Difference, ImVec2(max_tab_length, 0.0f))) {
+    if (selectable(_u8L("Difference").c_str(), m_operation_mode == MeshBooleanOperation::Difference, ImVec2(max_tab_length, 0.0f))) {
         m_operation_mode = MeshBooleanOperation::Difference;
     }
     ImGui::SameLine(0, 0);
-    if (selectable(_L("Intersection").c_str(), m_operation_mode == MeshBooleanOperation::Intersection, ImVec2(max_tab_length, 0.0f))) {
+    if (selectable(_u8L("Intersection").c_str(), m_operation_mode == MeshBooleanOperation::Intersection, ImVec2(max_tab_length, 0.0f))) {
         m_operation_mode = MeshBooleanOperation::Intersection;
     }
     ImGui::PopStyleVar();
@@ -257,7 +257,7 @@ void GLGizmoMeshBoolean::on_render_input_window(float x, float y, float bottom_l
     std::string cap_str1 = m_operation_mode != MeshBooleanOperation::Difference ? _u8L("Part 1") : _u8L("Subtract from");
     m_imgui->text(cap_str1);
     ImGui::SameLine(max_cap_length);
-    wxString select_src_str = m_src.mv ? "1 " + _L("selected") : _L("Select");
+    wxString select_src_str = m_src.mv ? "1 " + _u8L("selected") : _u8L("Select");
     select_src_str << "##select_source_volume";
     ImGui::PushItemWidth(select_btn_length);
     if (selectable(select_src_str.c_str(), m_selecting_state == MeshBooleanSelectingState::SelectSource, ImVec2(select_btn_length, 0)))
@@ -285,7 +285,7 @@ void GLGizmoMeshBoolean::on_render_input_window(float x, float y, float bottom_l
     std::string cap_str2 = m_operation_mode != MeshBooleanOperation::Difference ? _u8L("Part 2") : _u8L("Subtract with");
     m_imgui->text(cap_str2);
     ImGui::SameLine(max_cap_length);
-    wxString select_tool_str = m_tool.mv ? "1 " + _L("selected") : _L("Select");
+    wxString select_tool_str = m_tool.mv ? "1 " + _u8L("selected") : _u8L("Select");
     select_tool_str << "##select_tool_volume";
     ImGui::PushItemWidth(select_btn_length);
     if (selectable(select_tool_str.c_str(), m_selecting_state == MeshBooleanSelectingState::SelectTool, ImVec2(select_btn_length, 0)))
diff --git a/src/slic3r/GUI/Preferences.cpp b/src/slic3r/GUI/Preferences.cpp
index ae75efd1b..9b9a2592e 100644
--- a/src/slic3r/GUI/Preferences.cpp
+++ b/src/slic3r/GUI/Preferences.cpp
@@ -161,9 +161,6 @@ wxBoxSizer *PreferencesDialog::create_item_language_combobox(
         else if (vlist[i] == wxLocale::GetLanguageInfo(wxLANGUAGE_UKRAINIAN)) {
             language_name = wxString::FromUTF8("\xD1\x83\xD0\xBA\xD1\x80\xD0\xB0\xD1\x97\xD1\x9D\xD1\x81\xD1\x8C\xD0\xBA\xD0\xB0");
         }
-        else if (vlist[i] == wxLocale::GetLanguageInfo(wxLANGUAGE_UKRAINIAN)) {
-            language_name = wxString::FromUTF8("Ukrainian");
-        }
 
         if (language == vlist[i]->CanonicalName) {
             m_current_language_selected = i;