Why is Scottish not an accepted culture in Great Britain?
I started my game as England and formed Great Britain in 16th century. I assumed that Great Britain is a cultural union and would deem all cultures in British group to be accepted. However, Scottish remained unaccepted. Can someone shed some light on this? I have Common Sense expansion, if that is relevant.
Solution 1:
Since patch 1.14 Cultural union isn't any longer tied to country tag, but can be claimed once your country reaches Empire level. If you don't have Common Sense DLC active, the limit is owning at least 1000 development.
Source: changelog for 1.14 (link)