上下文菜单无法使用PyQt5显示正确的语言

import sys
from PyQt5.QtCore import QTranslator, QLocale
from PyQt5.QtWidgets import QApplication, QMainWindow

app = QApplication(sys.argv)

translator = QTranslator()
translator.load("translations/myapp_zh_CN.qm")  # 加载翻译文件

app.installTranslator(translator)  # 安装翻译器

# 创建主窗口
window = QMainWindow()
window.show()

sys.exit(app.exec_())

from PyQt5.QtCore import QObject, QCoreApplication

class MyWidget(QObject):
    def __init__(self, parent=None):
        super().__init__(parent)
        
        # 使用tr函数标记需要翻译的文本
        self.setWindowTitle(QCoreApplication.translate("MyWidget", "My Application"))

widget = MyWidget()

from PyQt5.QtWidgets import QMainWindow, QMenu, QAction

class MyWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        
        self.initUI()
        
    def initUI(self):
        # 创建上下文菜单
        context_menu = QMenu(self)
        
        # 创建菜单项
        action1 = QAction("Action 1", self)
        action2 = QAction("Action 2", self)
        
        # 将菜单项添加到上下文菜单
        context_menu.addAction(action1)
        context_menu.addAction(action2)
        
        # 设置上下文菜单
        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.customContextMenuRequested.connect(self.showContextMenu)
        
    def showContextMenu(self, pos):
        # 显示上下文菜单
        context_menu.exec_(self.mapToGlobal(pos))