language_manager.h

// language_manager.h
#pragma once
 
#include <QObject>
#include <QStringList>
#include <QTranslator>

class LanguageManager : public QObject
{
  Q_OBJECT
 
public:
  explicit LanguageManager(QObject* parent = nullptr);

  struct LanguageOption
  {
    QString code;   
    QString label;  
  };

  QList<LanguageOption> availableLanguages() const;

  QString currentLanguage() const;

  bool setLanguage(const QString& code);
 
signals:
  void languageChanged(const QString& code);
 
private:
  QString translationDir() const;

  QString qmFileForCode(const QString& code) const;
 
private:
  QTranslator mTranslator;             
  QString mCurrentLanguage = "en_US";  
 
  QList<LanguageOption> mAvailableLanguages;  
};