Instead of showing their own planet/crown as commonwealth logo I wished CW leaders can have their own commonwealth logo, so as to give them some customization, as well helps advertizing their own commonwealth.
Custom logo can be applicated in:
National flags and banners
Commonwealth in-game advertizing
Commonwealth selection list
Logo for commonwealth leader’s colony
and, all readers,
For discussing how commonwealth logo should be made for them, and share your ideas for making a logo!
On the other hand, I’ll share some of the logo components (artwork) in the comments!
(P.S. although I have no commonwealths but I hoped to help them)