National symbols

[True Federalist (진정한 연방 주의자)]

Given the history of Antillia, it probably had a defaced Red Ensign for its flag like Canada did until 1967 and Bermuda still uses.

It likely would have used a coat of arms similar to the one Quebec used 1868-1939:

Ony the maple leafs at the bottom would no doubt have been replaced by something more distinctively Antillian, say a whale or some other fish.  (As far as heraldry is concerned, a whale is a fish.)

As for what Antillia now uses, how about we assume that the dictatorship came up with a new flag of some sort (in which case purple would be appropiate, tho still ugly)  and thus give the parliament the trouble of having to decide on whether to use an old flag or come up with a new one?

[True Federalist (진정한 연방 주의자)]

Why would the coat of arms have Portuguese symbols?  IIRC, Until the dictatorship invited in the refugee Portuguese African colonists when Angola and Mozambique gained their sudden independence, Antillia had no significant Portuguese element.

[True Federalist (진정한 연방 주의자)]

Other than the objections I've had before to including Portuguese symbols in the coat of arms, no.

[True Federalist (진정한 연방 주의자)]

Rather than starting a new thread, I'm hijacking an old but appropriate one.

For fictional broadcasting or amateur radio entities, it would good to have an "official" call sign.  There are two I see as being most likely.

VL - officially assigned to Australian broadcasters, but apparently never actually used by them on air.

V9 - currently not assigned.

The whole V series of call signs was originally allocated to the British Empire (V for Victoria) so having a V-series call sign would make sense and these are the two that are available.

[True Federalist (진정한 연방 주의자)]

On a related subject, let me offer the following suggestions for Antillia's ISO 3166 codes and ccTLD.

AA is in the real ISO-3166 a user-defined code, so I propose we use it as Antillia's ISO-3166-1-alpha2 code and .aa as our TLD.

Of the obvious possibilities for our alpha-3 code:
ANT is in use by the IOC for Antigua and Barbuda.
ANA is not in use.
ATA is n use for Antarctica.
AIA is in use for Anguilla.
ALA is in use for the Aland Islands.

So of the above it looks like ANA is what it will have to be.

For our ISO-3166-2 codes let me suggest:

RB -  Robera
NW - New Wales
CR -  Carnarvon
RG - Reginia
LG -  LeGran
NU -  New Ulster
HS -  Hesperia
NA - North Antillia
AR - Arcadia
LM - Limeria
CL - Clairive

If the name is a province is two words, I used the first letter of each word.
If the name of a province is one word, I used the first letter and the next consonant.

If we want to avoid clashing with the U.S. and Canadian postal codes we'll need to change AR (Arcadia/Arkansas) and NU (New Ulster/Nunavut)  but I don't see the need.