Hi all,
I've adressed this issue in the feedback section a couple times, but I believe it may require a brief topic by its own. I'll try to keep it as short as possible.
(I'll focus on the early campaign (circa 1890-1920) since it's one of the periods that I've most played. I've not had the chance to encounter any issues during late campaign just yet).
The core of the problem
To begin with, in reality, the national flag of Spain until 1931 was this one (it was actually the naval ensign since 1785, but from 1843 onwards it became the Army & national flag):
Current naval ensign in game and what the national flag should be
The current national flag the game uses for Spain is that of the Nationalists during the first months of the Spanish Civil War (1936-1939), with it being the tricolor Republican flag with the purple stripe painted red (image below).
The flag in question
Of course, this makes no sense at all, since the flag wasn't concieved up until 1931. This flag is also lacking any monarchist symbology (since it employs a castle crown, instead of a royal one), which further makes it incompatible with the Spanish "Constitutional Monarchy" of the time.
Possible fixes and further issues
Well, the solution is quite obvious: simply replace the national flag, right? The problem I'd see with doing is is that all 3 flags displayed on the ship would be the same (since both the national flag and naval ensign were the same). I believe this could be solved in 2 ways:
Spain didn't really have a standard naval jack until 1945, so in my opinion no flag should be displayed at the bow of the ship. This could possibly be done with specific hull models.
Implementing naval jack system (for all nations), which I believe has already been suggested and I've mentioned some time back. In case this is even considered, the Spanish naval jack is commonly known as "Torrotito" (in use since 1945), shown in the image below:
Torrotito
If it's not possible to either remove the bow flag or implement the naval jack system, and thus all 3 flags being the same, is a price I'm willing to pay in order for this major inaccuracy to be fixed. I'm aware other countries also have inacuracies regarding their flags, and it affects game-immersion by a big chunk (at least for me). For example, I've read about the ridiculous situation of Democratic Germany displaying both the Bundesfalgge and Reichsflagge.
Anyway, that's all. This has been my first dedicated post so I hope it's been of some use and will help improve the game. Any feedback is appreciated!