diff -r 593a658cba8e -r 73e448b2943d src/mainwindow.h
--- a/src/mainwindow.h	Thu Oct 03 11:45:44 2019 +0300
+++ b/src/mainwindow.h	Thu Oct 03 23:44:28 2019 +0300
@@ -1,5 +1,6 @@
 #pragma once
 #include <QMainWindow>
+#include <QTranslator>
 #include <memory>
 #include <vector>
 #include "documentmanager.h"
@@ -13,12 +14,20 @@
 private slots:
 	void newModel();
 	void openModel();
+	void languageChangeRequested();
+protected:
+	void changeEvent(QEvent* event);
 private:
 	std::unique_ptr<class Ui_MainWindow> ui;
 	DocumentManager documents;
 	QMap<Model*, QWidget*> modelWidgets;
 	QWidget* createWidgetForModel(Model* model);
 	QWidget* getWidgetForModel(Model* model);
+	void loadLocales();
 	void updateTabs();
 	void updateTitle();
+	void changeLanguage(const QString& localeCode);
+	static QString pathToTranslation(const QString& localeCode);
+	QString currentLanguage = "en";
+	QTranslator translator;
 };