National language of your country

[Bagong Luzon]

Filipino and English are the official languages of the Kingdom of New Luzon, with Filipino being the national language.

[Blue Key]

English is the language of daily life in Blue Key.
There also exists the local BK Jargon

[Great Celestial China]

Chinese

[Agoi]

Agoan and Basic (English). Over the past hundred or so years, Basic has become the most common language spoken, but Agoan is still widely taught and it is the language of religious ceremonies.

[Nescala]

Nescala speaks the language isolate known as Cuttonescu (Reu cŭttonĕscu). It has numerous dialects, which can be very roughly grouped into Highland and Lowland Cuttonescu.

[Irou]

Americano (a mix between Spanish and english)
Americanized Japanese
English Ebonics
English
Japanese
Urbano (A combination of all the languages above and few influences from east asian dialects and arab/african dialects)

[The Ruins of Southern New Boston]

A language known as "Old Bostonian", a mix of English, French, and Old English, with hints of of Danish, Swedish, Swiss German, Aleut, and Carrier.

[2nd Brazilian Empire]

International Portuguese.

European	Brazilian	International	English
Comboio	Trem	Trem	Train
Castanho	Marrom	Castanho	Brown
Frigorífico	Geladeira	Frigorífico	Refrigerator
Chávena	Xícara	Xícara	Cup
Telemóvel	Celular	Telemóvel	Cell Phone
Video-jogo	Videogame	Video-jogo	Video game
Papaia	Mamão	Papaia	Papaya
Paragem	Ponto de Ônibus	Ponto de Ônibus	Bus Stop
Guarda-redes	Goleiro	Guarda-redes	Goalkeeper
Equipa	Time	Equipa	Team
Rés-do-chão	Térreo	Térreo	Ground Floor
Bairro de lata	Favela	Favela	Slum
Passadeira	Faixa de pedestres	Passadeira	Crosswalk
Portagem	Pedágio	Pedágio	Toll
Ecrã	Tela	Ecrã	Screen
Ficheiro	Arquivo	Ficheiro	Archive
Fato	Terno	Terno	Suit
T-Shirt	Camiseta	Camiseta	T-Shirt
Bolacha	Biscoito/Bolacha	Bolacha	Cookie

Gerund: Suffix -ndo after the verb in the infinitive form without the letter R (Example: Comer [to eat] is Comendo [eating]).

Foreign Words: The use of foreign words is prohibited (Example: video-jogo instead of videogame|ficheiro instead of arquivo)

Other national languages are:

Spanish
Guarani
Arabic
Berber
Danish
Icelandic
Greenlandic

[Alta Italia]

Italian is the official language & the first language of a great majority of the population, but English is a near-universal second language, and many other languages (notably French, Spanish, & Arabic) are spoken throughout Alta Italia, too.

[The State of Communism]

The official language of Oceania is English, but Spanish is used widely too.

[Alsbruck]

The official language of Alsbruck is Alsbruck German, a dialect of German typically spoken in Alsbruck and has been recognized by the Prince of Alsbruck himself as the only official and national language in the country.

[Bolkenia]

French. Yes, very creative isn't it ?

[New Yalen]

New Yalenian is the most commonly used language, but Middle Yalening (also called Old Yalenian) is also an official language, but it's only used in the rural areas.
The two languages are wildly different, and barely anyone speaks both, which can cause confusion.

[Puldania]

Puldanian and Slaotvoli are the official languages of Puldania. Phalonian is a recognized regional language.

Puldanian: Dië gench ckz tarov ná klorik respovarva. Paju vlai yeüt nas tetun retning.
Slaotvoli: Te kanj kza taref ne kelarik ruzpofarji. Baju vleih yut nuz teto renin.
Phalonian: Tea ganza kuz trofa na kloria respovaria. Pau vla ut nas tun reni.

The young girl gave no clear response. Birds fly but lack a direction.

[Azmara]

The national language of the Commonwealth of Azmara is Azmaran, a West Germanic language. It shares close relations with Old English, Frisian and Dutch, and is spoken by around 95% of Azmara as a native language.

Sample:
Wyn fader en heben, - Our father in heaven,
jun naam is hylag, - Hallowed be your name (lit. your name is holy)
jun kyninkryk is gaanen komen, - Your kingdom come (lit. your kingdom is going to come)
jun wil is gaanen done - Your will be done (lit. your will is going to be done)
an erþ en in heben. - On Earth and in Heaven.
Jibest nuudaag wyn daagli brad, - Give us today our daily bread (lit. give today our daily bread)
Forjibest wyn synnen, - Forgive us our sins (lit. forgive our sins)
alśo wy forjibest þaten wo nihtwit wym synne. - as we forgive those who sin against us
Niht laidest wym taa forlaiden - Lead us not into temptation (lit. don’t lead us to temptation)
buten befriist wym fram ybil. - But deliver us from evil (lit. but set us free from evil)
For de Kyninkryk, de stranghed, - For the Kingdom, the power (lit. for the kingdom, the strength)
en de worþśip byyn jun, - and the power are yours (lit. and the worship are yours)
nuu en for altyd, - Now and for ever,
Aamen. - Amen.

[Afrique Occidentale]

French. Yes, very creative isn't it ?

Same here, though really mine is obvious

[The Northeastern Confederation]

Standart Northeastener Portuguese

is a variation from the Old Brazillian Portuguese spoken at the times of the old republic. It went further and further away from its parent language with time, but they are still mutually inteligible.

[Catierro]

English, Spanish, French, Portuguese, Romanian, and Italian

[Chagall]

The language of Chagall is electric guitar. The language of Culture Center as a whole is music.

[Sicaris]

Imagine German, Nordic, and English languages combined along with several words made up by myself.

[Exosar]

Exosar has four National Languages they are English, Russian, Japanese, and the near-extinct Kamchatkan.

[The Universe of Shadows]

English, mainly Shadowisan but people are welcome to speak anything. Though the official language is Shadowisan English

[Morvan]

French is the main language and language of government, but the Arawak languages are recognized as official languages and efforts exist to preserve them.

[Serrono]

Serronan is the national official language of the Republic. It is an Italic language. It is most closely related to the Oscan-Umbrian language family and distantly related to Latin.

[Malavious]

Latin.