FullCalendar v4语言环境不会更改标题按钮标签

Question

我已经使用fullCalendar在Salesforce中实现了一个解决方案。当我使用其他语言环境时，标题上的按钮不会更改。有没有人遇到过同样的问题？我是否需要添加更多内容？正如我在locales文件夹中看到的那样，每个语言的buttonTexts确实存在。但是我无法找出为什么它们在标头中不翻译。

initialiseFullCalendar(eventView, startDate, endDate, counter) {
    console.log("locale is: " + this.locale.data);
    //const eventsData = this.myEvents.data;
    let dataObj = {};
    let events = [];
    const ele = this.template.querySelector("div.fullcalendar");
    //console.log("ele >>> " + ele);
    var calendar = new FullCalendar.Calendar(ele, {
      firstDay: 1, //set first day of the week Monday
      header: {
        left: "prev,next,today",
        center: "title",
        right: "dayGridMonth,timeGridWeek,timeGridDay"
      },
      locale: this.locale.data,
      plugins: [
        "interaction",
        "resourceDayGrid",
        "resourceTimeGrid",
        "dayGrid",
        "timeGrid",
        "timeline",
        "interactionPlugin",
        "list"
      ],
      events: {},
      defaultView: "timeGridWeek",
      datesRender: function (info) {
        //Triggered when a new set of dates has been rendered.
        eventView.value = info.view.type; //set the new event view to the eventView variable
        startDate.value = info.view.activeStart.toISOString().slice(0, 10); //set the new start date formatted in (YYYY-MM-DD)
        endDate.value = info.view.activeEnd.toISOString().slice(0, 10); //set the new end date formatted in (YYYY-MM-DD)
        counter.value += 1; //Increment the counter by 1, in order to fire the event
        getEventsForDateRange({
          //Call Apex method getEventsForDateRange giving the new set of dates
          fromDate: startDate.value,
          endDate: endDate.value
        })
          .then((result) => {
            //get the results of the events list that should be rendered
            console.log(result);
            var eventSources = calendar.getEventSources();
            var len = eventSources.length;
            //Erase all the existing events in the calendar
            for (var i = 0; i < len; i++) {
              eventSources[i].remove();
            }
            len = result.length;
            dataObj = {};
            events = [];
            //Build again the list of the events that should be displayed
            for (var i = 0; i < len; i++) {
              dataObj.id = result[i].id;
              dataObj.start = result[i].StartDateTime;
              dataObj.end = result[i].EndDateTime;
              dataObj.title = result[i].Subject;
              events.push(dataObj);
              dataObj = {};
            }
            calendar.addEventSource(events); //Render the new events to the Calendar!
          })
          .catch((error) => {
            this.error = error;
            console.log(error);
          });
      }
    });
    calendar.render();
  }

这是我需要更改的内容：