How to change 'blogger' from url

Hi there,

I'm trying to change from sef url 'blogger' to other name but with no result...

I need to change instead 'mywebsite.com/blogger/all-blogger-news'
to
'mywebsite.com/writer/all-blogger-news'

where can I change it? which file is responsible for it?

I'll be very grateful for your help!

Best regards
Adam