I heard the sentence from a non-native:
He spoke in Greek, which language I could only follow with difficulty.
Here, which attracts my attention! Has it been used correctly? Normally I would say the (very) language.
I heard the sentence from a non-native:
He spoke in Greek, which language I could only follow with difficulty.
Here, which attracts my attention! Has it been used correctly? Normally I would say the (very) language.
No, which begins a new phrase usually. So after which will follow a subject/verb/etc, or those will be elided and implied.
Which can be a pronoun in a question, though.
I took the book off the shelf.
I took which book off the shelf (doesn't work)
You took which book off the shelf? (works)
Did you see the book Jason had? No, I couldn't find which one (= I couldn't find which one Jason had).
Whichever works more like a determiner/article:
I wanted to buy a car today. The one which Jason was talking about.
I wanted to buy whichever car today that Jason was talking about.