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diff --git a/editor/editor_locale_dialog.h b/editor/editor_locale_dialog.h
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+/*************************************************************************/
+/*  editor_locale_dialog.h                                               */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef EDITOR_LOCALE_DIALOG_H
+#define EDITOR_LOCALE_DIALOG_H
+
+#include "core/string/translation.h"
+#include "scene/gui/dialogs.h"
+
+class Button;
+class HBoxContainer;
+class VBoxContainer;
+class LineEdit;
+class Tree;
+class OptionButton;
+class UndoRedo;
+
+class EditorLocaleDialog : public ConfirmationDialog {
+	GDCLASS(EditorLocaleDialog, ConfirmationDialog);
+
+	enum LocaleFilter {
+		SHOW_ALL_LOCALES,
+		SHOW_ONLY_SELECTED_LOCALES,
+	};
+
+	HBoxContainer *hb_locale = nullptr;
+	VBoxContainer *vb_script_list = nullptr;
+	OptionButton *filter_mode = nullptr;
+	Button *edit_filters = nullptr;
+	Button *advanced = nullptr;
+	LineEdit *lang_code = nullptr;
+	LineEdit *script_code = nullptr;
+	LineEdit *country_code = nullptr;
+	LineEdit *variant_code = nullptr;
+	Tree *lang_list = nullptr;
+	Tree *script_list = nullptr;
+	Tree *cnt_list = nullptr;
+
+	UndoRedo *undo_redo = nullptr;
+
+	bool locale_set = false;
+	bool updating_lists = false;
+
+protected:
+	static void _bind_methods();
+	virtual void _post_popup() override;
+	virtual void ok_pressed() override;
+
+	void _item_selected();
+	void _filter_lang_option_changed();
+	void _filter_script_option_changed();
+	void _filter_cnt_option_changed();
+	void _filter_mode_changed(int p_mode);
+	void _edit_filters(bool p_checked);
+	void _toggle_advanced(bool p_checked);
+
+	void _update_tree();
+
+public:
+	EditorLocaleDialog();
+
+	void set_locale(const String &p_locale);
+	void popup_locale_dialog();
+};
+
+#endif // EDITOR_LOCALE_DIALOG_H