Log into Nexus.
Click on Options. See:
Just above where the mouse pointer is on that screenshot.
This opens up the option screens which looks like:
Then, click on 'Regional Settings', which is the top link off the left hand side as illustrated below.
Finally, as shown in the screenshot below, change it to English(United Kingdom)
The lanugage section is that in the top have of the page and in that final screenshot shows you what you need to change it to. From the drop down menu it is the 11th from the top.
Then click Save, which is the button just above with a picture of a floppy disk.