Unionita Stati di Europa (USE)

NATIONAL: it is used for official names and logos in particular state
Official: it is official in given state, not necessarily statewide
used: it is used in given state, but without official force
local: it is not official at European level

State legislation is written in national language. Communication with Union is provided in European (not local) languages or in Ido (working language of Union). European legislation is written in Ido and not translated unless demand. Interpretation in European Parliament is one-way: from Ido or to Ido. Ido is mandatory taught in schools, so every MEP can speak or understand it.

European languages: Bulgarian, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian, Italian, Latvian, Lithuanian, Maltese, Polish, Portuguese, Romanian, Slovak, Slovene, Spanish, Swedish. Possibly also Catalan and Irish.
Local national languages: Basque, Frisian, Galician, Luxembourgish, Sami. Their use on European logos is limited.

If covering all Europe, Bosnian and Rusyn are also local national. They are useless in Brussels because of intelligibility with Croatian and Ukrainian. However, Czechoslovak and Nordic languages are all included (Norwegian only in Bokmal variant).

CODE	NAME	SYMBOLS	CAPITAL	LANGUAGES
ax	Aland		Marienhamn	SWEDISH finnish
al	Alsace-Lorraine	(without crown)	Strasbourg	FRENCH German
an	Andalusia	(without letters)	Sevilla	SPANISH
at	Austria		Wien	GERMAN hungarian slovene
bq	Basque Country		Vitoria-Gasteiz	BASQUE Spanish
br	Brittany		Rennes	FRENCH Breton
bg	Bulgaria		Sofija	BULGARIAN
ca	Catalonia		Barcelona	CATALAN Spanish
co	Corsica		Ajaccio	FRENCH Corsican
hr	Croatia		Zagreb	CROATIAN
cy	Cyprus		Lefkosia	GREEK turkish
cz	Czechia		Praha	CZECH slovak
dl	Dalmatia		Split	CROATIAN italian
dk	Denmark		Kobenhavn	DANISH english
en	England and Wales		London	ENGLISH Welsh
ee	Estonia		Tallinn	ESTONIAN russian
fi	Finland		Helsinki	FINNISH Swedish
vl	Flanders		Antwerpen	DUTCH french
fr	France		Paris	FRENCH
gl	Galicia		Santiago de Compostela	GALICIAN Spanish portuguese
gr	Greece		Athina	GREEK
hu	Hungary		Budapest	HUNGARIAN
ie	Ireland		Dublin	IRISH English
it	Italy	(without letters)	Roma	ITALIAN
lp	Lapland		Kiruna	SAMI SWEDISH Finnish
lv	Latvia		Riga	LATVIAN russian
lt	Lithuania		Vilnius	LITHUANIAN polish russian
lu	Luxembourg		Luxembourg	LUXEMBOURGISH FRENCH German
mt	Malta		Valetta	MALTESE English
nl	Netherlands		Amsterdam	DUTCH frisian
nd	North Germany		Hannover	GERMAN low saxon
oc	Occitania		Marseille	FRENCH Occitan
pl	Poland		Warszawa	POLISH
pt	Portugal		Lisboa	PORTUGUESE
pr	Prussia		Berlin	GERMAN
ro	Romania		Bucuresti	ROMANIAN
sa	Sardinia		Cagliari	ITALIAN Sardinian
sx	Saxony		Leipzig	GERMAN Sorbian
sc	Scotland		Edinburgh	ENGLISH Scottish Gaelic scots
sl	Silesia		Wroclaw	POLISH German Silesian
sk	Slovakia		Bratislava	SLOVAK czech hungarian
si	Slovenia		Ljubljana	SLOVENE croatian hungarian italian
sd	South Germany		München	GERMAN alemannic bavarian
st	South Tyrol		Bozen	GERMAN Italian Ladin
es	Spain		Madrid	SPANISH
se	Sweden		Stockholm	SWEDISH
ts	Transylvania		Cluj	ROMANIAN Hungarian German
ul	Ulster		Belfast	ENGLISH Irish scots
wa	Wallonia		Namur	FRENCH German walloon
wd	West Germany		Bonn	GERMAN
de	All Germany			GERMAN
bl	Brussels Federal District			IDO French Dutch
		Possible states
ar?ag	Aragon		Zaragoza	SPANISH Aragonese
fy	Frisia		Leeuwarden	FRISIAN Dutch
nc	Northern Cyprus		Lefkosa	TURKISH Greek
pd	Padania		Milano	ITALIAN
ve	Veneto		Venezia	ITALIAN Venetian
ba	Bosnia and Herzegovina		Sarajevo	BOSNIAN Croatian Serbian
sr	Serbia		Beograd	SERBIAN albanian
me?cg	Montenegro		Podgorica	SERBIAN
mk	Macedonia		Skopje	MACEDONIAN Albanian
sq	Albania		Tirane	ALBANIAN
is	Iceland		Reykjavík	ICELANDIC
no	Norway		Oslo	NORWEGIAN
md	Moldova		Chişinau	ROMANIAN Russian
kg	Baltic Russia		Kaliningrad	RUSSIAN German
kp	Subcarpathia		Užhorod	RUSYN UKRAINIAN slovak hungarian romanian