Thanks for your effort to improve Ubuntu by reporting these observations!
To get rid of the languages you don't need, uncheck them in the "Installed Languages" window and click "Apply Changes".
As regards Chinese, it's a known issue. You can prevent the Chinese item from showing up by opening a terminal window and run:
sudo locale-gen --purge
Thanks for your effort to improve Ubuntu by reporting these observations!
To get rid of the languages you don't need, uncheck them in the "Installed Languages" window and click "Apply Changes".
As regards Chinese, it's a known issue. You can prevent the Chinese item from showing up by opening a terminal window and run:
sudo locale-gen --purge