Program: 39864
Project: 39864
Buggy source:
protected void decorateMenuButton(MenuButton menu){
  menu.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  MenuItem newItem=new MenuItem();
  MenuItem loadItem=new MenuItem();
  MenuItem saveItem=new MenuItem();
  MenuItem refreshItem=new MenuItem();
  MenuItem closeItem=new MenuItem();
  Menu languageMenu=new Menu();
  MenuItem english=new MenuItem("String_Node_Str");
  MenuItem simChin=new MenuItem("String_Node_Str");
  languageMenu.getItems().addAll(english,simChin);
  newItem.setOnAction(event -> {
    if (pagePane != null) {
      pagePane.buildPane();
    }
  }
);
  loadItem.setOnAction(this::selectFile);
  saveItem.setOnAction(this::saveFile);
  refreshItem.setOnAction(event -> load());
  closeItem.setOnAction(event -> {
    if (pagePane != null) {
      Tab page=pagePane.getSelectionModel().getSelectedItem();
      if (page != null) {
        page.getOnClosed().handle(event);
        pagePane.getTabs().remove(page);
      }
    }
  }
);
  english.setOnAction(value -> Main.generateNames(new Locale("String_Node_Str")));
  simChin.setOnAction(value -> Main.generateNames(new Locale("String_Node_Str","String_Node_Str")));
  newItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  loadItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  saveItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  refreshItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  closeItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  languageMenu.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  newItem.setAccelerator(new KeyCodeCombination(KeyCode.T,KeyCombination.SHORTCUT_DOWN));
  loadItem.setAccelerator(new KeyCodeCombination(KeyCode.L,KeyCombination.SHORTCUT_DOWN));
  saveItem.setAccelerator(new KeyCodeCombination(KeyCode.S,KeyCombination.SHORTCUT_DOWN));
  refreshItem.setAccelerator(new KeyCodeCombination(KeyCode.R,KeyCombination.SHORTCUT_DOWN));
  closeItem.setAccelerator(new KeyCodeCombination(KeyCode.W,KeyCombination.SHORTCUT_DOWN));
  menu.getItems().addAll(newItem,loadItem,saveItem,refreshItem,closeItem,languageMenu);
}

Fixed version (ground truth):
protected void decorateMenuButton(MenuButton menu){
  menu.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  MenuItem newItem=new MenuItem();
  MenuItem loadItem=new MenuItem();
  MenuItem saveItem=new MenuItem();
  MenuItem refreshItem=new MenuItem();
  MenuItem closeItem=new MenuItem();
  Menu languageMenu=new Menu();
  MenuItem english=new MenuItem("String_Node_Str");
  MenuItem simChin=new MenuItem("String_Node_Str");
  languageMenu.getItems().addAll(english,simChin);
  newItem.setOnAction(event -> {
    if (pagePane != null) {
      pagePane.buildPane();
    }
  }
);
  loadItem.setOnAction(event -> {
    Page page=(Page)pagePane.getSelectionModel().getSelectedItem();
    if (page != null)     page.getController().selectFile(event);
  }
);
  saveItem.setOnAction(event -> {
    Page page=(Page)pagePane.getSelectionModel().getSelectedItem();
    if (page != null)     page.getController().saveFile(event);
  }
);
  refreshItem.setOnAction(event -> {
    Page page=(Page)pagePane.getSelectionModel().getSelectedItem();
    if (page != null)     page.getController().load();
  }
);
  closeItem.setOnAction(event -> {
    if (pagePane != null) {
      Tab page=pagePane.getSelectionModel().getSelectedItem();
      if (page != null) {
        page.getOnClosed().handle(event);
        pagePane.getTabs().remove(page);
      }
    }
  }
);
  english.setOnAction(value -> Main.generateNames(new Locale("String_Node_Str")));
  simChin.setOnAction(value -> Main.generateNames(new Locale("String_Node_Str","String_Node_Str")));
  newItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  loadItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  saveItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  refreshItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  closeItem.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  languageMenu.textProperty().bind(Main.namesMap.get("String_Node_Str"));
  newItem.setAccelerator(new KeyCodeCombination(KeyCode.T,KeyCombination.SHORTCUT_DOWN));
  loadItem.setAccelerator(new KeyCodeCombination(KeyCode.L,KeyCombination.SHORTCUT_DOWN));
  saveItem.setAccelerator(new KeyCodeCombination(KeyCode.S,KeyCombination.SHORTCUT_DOWN));
  refreshItem.setAccelerator(new KeyCodeCombination(KeyCode.R,KeyCombination.SHORTCUT_DOWN));
  closeItem.setAccelerator(new KeyCodeCombination(KeyCode.W,KeyCombination.SHORTCUT_DOWN));
  menu.getItems().addAll(newItem,loadItem,saveItem,refreshItem,closeItem,languageMenu);
}