Help! Can't find content to edit text of right hand column

Hi Contao Community
I'm having some trouble editing a website and very much hoping that you can help. I am a CMS novice and haven't used Contao before.
I want to correct a spelling mistake in the text on a column that appears on the right hand side of every page. Problem is, I can't find anywhere to access the text. I've been through every article, page, menu option etc but the closest I've got to anything to do with the column is in themes, where I can change the format but not the text.
Would appreciate any suggestions you might have.
Thanks in advance
S

Probably there is a module or an article included in page layout? You should check that, getting some clues how the content in the right bar is embedded (there are several ways to do that in Contao).