In a couple of the stylesheets I have been using for quite a few years, there is one section named "blizockquote". I've always wondered what this is. Does anyone know about this? And, if so, what does it affect, i.e., what is displayed?

looks like a typo.. more like 'blockquote', imho

Actually, it is not a typo. There is a separate section named "blockquote" too. Strange, eh?

Perhaps, it is a language other than English, e.g., German?

Sounds like someone made up some custom classes.

Yep, that's very well possible. FYI, it is found in the old "Nami Gradient" stylesheet, although there are a couple of others that have that same section.

That's most likely then, a custom class to fix/develop a style for the blockquote section.