Hello.
How to do location for it i want to keep the default labels
If you are using custom locale you need to provide these strings too. You need following localization configs:
PdfExport, ExportDialog, ExportRowsCombo, ExportOrientationCombo, SinglePageExporter, MultiPageExporter, MultiPageVerticalExporter, ScheduleRangeCombo and SchedulerExportDialog. As usual, you can find them in the provided locales.
Even the all rows is selected but only visible are shown and bar charts are not shown properly ?
According to screenshots you're picking singlepage exporter, that would export all rendered rows to one page. How many rows are not exported? Do you use filter on the task store?
Regarding missing task bars, last screenshot suggests you're using custom styles for task bars and they are not working as you would expect. Inspect post request to the server in browser, you'll see HTML which is sent to the server. Save it as HTML page and open it in the browser. Does it look as expected? More likely it doesn't. See which CSS is missing.
Normally exporter would go through HEAD element and collect all <style> tags and <link rel="stylesheet">, probably it missed some.
How do you start your export server?