Killing 3 Danish version is on BBC4 in November so Spiral 4 must be after Christmas.
Borgen 2 is on in the new year.
They have shown 8 eps of Spiral 4 in France. 4 remaining.
French DVD of Season 4 available from 11th Oct - according to this
No English subs sadly.
I'm assuming the French text on the Amazon.Fr site says it's available from the 11th Oct. Knowing my language skills that could be unreliable.