Removing mistakenly applied linseed oil over lacquer?
From what I understand, white spirits/mineral spirits should work, but turpentine is maybe better. I also understand that WD-40 will work as well, but I have no first-hand experience using it for removing linseed oil.

Incidentally, I believe turpentine in German is "Terpentin" while "Terpentinersatz" is white spirits.

Both seem to be available here, for examples of products/brands: 


"Terpentin" at Amazon (DE)
"Essence de térébenthine" at Amazon (FR)       
"Trementina" at Amazon (IT)