I update the English in our i18n repo, and upon doing so realized that we now
have two identical strings.  This ticket is now superseded by:

issue897

There a small bit of bad and/or confusing grammar in the sidebar of the license
chooser results page:

"Mark a document not on the web, add this text to your work."

That is awkward language and should probably be more like:

"Mark a document not on the web by adding this text to your work".

Indeed, I have noticed that the current Spanish and Portuguese translations took
it into their own hands and corrected the grammar in their own translations.