either... or

English as a Second Language English Vocabulary, Grammar and Idioms
1

Are all these sentences correct:

[color=red]1) They hire every actor who speaks German or Italian. I don’t know which.
[color=indigo]2) They hire every actor either who speaks German or who speaks Italian. I don’t know which.

[color=red]3) They hire every actor either with a good knowledge of German or with a good knowledge of Italian. I don’t know which.
[color=indigo]4) They hire every actor with either a good knowledge of German or a good knowledge of Italian. I don’t know which.

[color=red]5) They hire every actor with a good knowledge of German or with a good knowledge of Italian. I don’t know which.

[color=blue]6)They hire either every actor with a good knowledge of German or every actor with a good knowledge of Italian. I don’t know which.

(6) is clear, but do the others work?

Gratefully,
Navi.

2

The second sentence ‘I don’t know which’ makes everything strange and unclear in every case. None of them work with that.

3

Thank you very much, Beeesneees, for all your kind replies.

Are these acceptable:

[color=red]6) It is either every actor who speaks German or every actor who speaks Italian that they hire. I don’t know which.
[color=indigo]7) It is either every actor who speaks German that they hire or every actor who speaks Italian. I don’t know which.

[color=red]8) It is either stamps or coins that he collects. I don’t know which.
[color=indigo]9) It is either stamps that he collects or coins. I don’t know which.

Gratefully,
Navi.

4

Yes, they work, though they are a little over-complicated for normal use. This is what I would expect.

They either hire every actor who speaks German or every one who speaks French, but I don’t know which.
He collects either stamps or coins, but I don’t know which.