We tied to play this recently, using the English translation from this Forum ( for which, Thanks !)
We did find it rather hard to understand tho.
It seems there are 4 kinds of *cards*
Ship - build a new ship
Row/Column - place a new unit in that row/column
Land - place a new unit in that land
Population growth - place a new unit next to an existing ( friendly) unit
with 5 different Actions, of which the Player chooses four ...
Attack - an existing (enemy) unit ( in a "full" country or sea)
Expand - place a new unit in a free space
Migrate - move one existing unit to a free space
Swap cards - swap 2 cards ( alternative to Migrate)
Sail - move any or all ships one space each.
Of these 5 different Actions, only TWO [ Attack and Expand] require a Card (ie targeting a particular space).
note that the "Ship" card is NOT required for the "Sail" Action (!)
Have I now got that right ?