DatePickerDialog弹窗，HarmonyOS 鸿蒙Next系统设置英文，弹窗内容也变成了英文

可以设置app语言 I18n.System.setAppPreferredLanguage(‘zh-Hans’)

import I18n from '@ohos.i18n';
@Component
struct DatePickerDialogExample {
  selectedDate: Date = new Date("2010-1-1")

  build() {
    Column() {
      Button('切换')
        .onClick(()=>{
          // 将系统语言为英文时将app当前语言设置为中文
          if(I18n.System.getSystemLanguage()=='en-Latn-US'){
            // 切换语言：zh-Hans（中文） en-Latn-US（英文）
            I18n.System.setAppPreferredLanguage('zh-Hans')
          }
        })
      Button("DatePickerDialog")
        .margin(20)
        .onClick(() => {
          DatePickerDialog.show({
            start: new Date("2000-1-1"),
            end: new Date("2100-12-31"),
            selected: this.selectedDate,
            showTime:true,
            useMilitaryTime:false,
            disappearTextStyle: {color: Color.Pink, font: {size: '22fp', weight: FontWeight.Bold}},
            textStyle: {color: '#ff00ff00', font: {size: '18fp', weight: FontWeight.Normal}},
            selectedTextStyle: {color: '#ff182431', font: {size: '14fp', weight: FontWeight.Regular}},
            onDateAccept: (value: Date) =>{
              // 通过Date的setFullYear方法设置按下确定按钮时的日期，这样当弹窗再次弹出时显示选中的是上一次确定的日期
              this.selectedDate = value
              console.info("DatePickerDialog:onDateAccept()" + value.toString())
            },
            onCancel: () =>{
              console.info("DatePickerDialog:onCancel()")
            },
            onDateChange: (value: Date) =>{
              console.info("DatePickerDialog:onDateChange()" + value.toString())
            },
            onDidAppear: () =>{
              console.info("DatePickerDialog:onDidAppear()")
            },
            onDidDisappear: () =>{
              console.info("DatePickerDialog:onDidDisappear()")
            },
            onWillAppear: () =>{
              console.info("DatePickerDialog:onWillAppear()")
            },
            onWillDisappear: () =>{
              console.info("DatePickerDialog:onWillDisappear()")
            }
          })
        })

      Button("Lunar DatePickerDialog")
        .margin(20)
        .onClick(() => {
          DatePickerDialog.show({
            start: new Date("2000-1-1"),
            end: new Date("2100-12-31"),
            selected: this.selectedDate,
            lunar: true,
            disappearTextStyle: {color: Color.Pink, font: {size: '22fp', weight: FontWeight.Bold}},
            textStyle: {color: '#ff00ff00', font: {size: '18fp', weight: FontWeight.Normal}},
            selectedTextStyle: {color: '#ff182431', font: {size: '14fp', weight: FontWeight.Regular}},
            onDateAccept: (value: Date) =>{
              this.selectedDate = value
              console.info("DatePickerDialog:onDateAccept()" + value.toString())
            },
            onCancel: () =>{
              console.info("DatePickerDialog:onCancel()")
            },
            onDateChange: (value: Date) =>{
              console.info("DatePickerDialog:onDateChange()" + value.toString())
            },
            onDidAppear: () =>{
              console.info("DatePickerDialog:onDidAppear()")
            },
            onDidDisappear: () =>{
              console.info("DatePickerDialog:onDidDisappear()")
            },
            onWillAppear: () =>{
              console.info("DatePickerDialog:onWillAppear()")
            },
            onWillDisappear: () =>{
              console.info("DatePickerDialog:onWillDisappear()")
            }
          })
        })
    }.width('100%')
  }
}