20 Oct
2016
20 Oct
'16
10:07 a.m.
Good day
LibreOffice uses the global settings of your installation.
In Fedora 24 you can check it in:
Settings -> System Settings -> Regional Settings -> Formats -> Region
You can change your Region to "United States - American English (en_US)" This should take care of your paper size to "Letter" and probably your dictionary as well.
I hope this helps Jesuan