If I said that I'm an atheist in your nation?

[Abarri]

Looked at briefly, then ignored. (Expect shrugs.)

[New Udonia]

Considering atheism is one of the top-ten religions of New Udonia, and virtually every religion is legal (not every religious practice),

[Tursvania]

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[Altion]

The reaction depends on the species. Some species who inhabit our nation are quite spiritual in nature, while some are distrustful of religion in general.

[The Congo Delta]

Shrugs and all will wonder if there is anything else.
If you said you were religious, you would get serious problems.

[Hurjaki]

Immediately taken away by police. Executed in public on a day not far away.

[New Mivango]

You'd probably be invited to join one of the many Atheist Youth Clubs popular in the capital, Tsavatsaville (renamed in honor of the Great Leader, President Louis Tsavatsa). While much of the countryside and the rural provinces is full of animinists and Catholics (along with some other Christians), atheism has grown under the leadership of Tsavatsa and his regime, much of it sponsored by President Tsavatsa himself and his many relatives and friends in high places in power. President Tsavatsa is probably the most popular atheists in the country, if not the most popular.

[Britamcanzeastralia]

Nothing would happen.

[Arcanstotska]

Locked up in a mental institute until you join a religion
I say "join a religion" because atheism isn't a religion, but rather a lack thereof

[Serailia]

As long as you respect freedom of religion, you would become just like any other atheist in the country.

[Rynese Empire]

Literally noone would care. the See of the Artifice is not really so much a religion as much as it is the arcane thread that keeps the nation running, therefore everyone knows about it, and nobody cares if an outsider doesn't believe in it.

[The Trois-Riveres]

Most people in the Trois-Riveres would be relatively indifferent, as the bulk of the populace is atheist or agnostic themselves. The government does not promote any religion, nor provide funding for any religious institution, so the government wouldn't care either. There would be some who would probably get vocal about it, as those who believe in a faith are free to do so, and have the liberty to tell you what they believe.

[Wajuti]

You would be an honorless apostate who is fit to be enslaved. Like any other religion or religious opinion other than the Wajuti way.

Unless you are there as a foreigner under the protection of the High Lord, e.g. a wealthy tourist bringing cold hard cash, a specialist bringing technical expertise, or a criminal bringing connections for our network of Human Resources importation, that is human traffickers.

[Felsigberg]

You would get weird looks. Saying bad stuff about religion will get you beaten up.

[The Nahi Confederacy]

Like above, you'd get some weird looks, but honestly you'd be mostly fine. The Nahi religion, the Faith of the Twelve Rings, is extremely vague in the definition of its god. So vague, in fact, many claim natural phenomena as not just proof of their god, but as manifestations of their god, so definitely prepare for some shrugs, laughs and confused head-shaking. Other than that, you'll be fine.

[Paradisia Heavenlonia Stralisia Union]

You would be looked at and those that are looking at you usually say something like,"Okay. Intresting", and then continue on what they were doing.

[Bokhtar]

Among the more enlightened circles this might be safe to pronounce; among the commoners, you might get a response of "You mean to tell me you don't believe in the sun?"; but apostasy is still considered a crime against the Temple and they may see fit to have you judged by Zûn, the deified sun — the process of which includes stripping the accused of all clothing, placing oil on exposed skin, and tying the accused in a splayed position where they will be exposed to direct sunlight for a number of days.

[Vincere Terrae]

people will look at you weird for mentioning it because everyone is atheist anyway

[The World Capitalist Confederation]

You'd just get stared at as literally everyone else is an atheist due to the attacks on religion.

[Astoriya]

As quite a large amount of the population is atheist, you'd get briefly stared at, then get said to you, 'That's OK', then shrugged iff

[Polish Prussian Commonwealth]

You may as well bend over-that admission automatically brands you as a communist fifth column due to atheism's association with the hated(and defunct) communist puppet government.

[Hystaria]

Ignored, most Historians are faithless but they are dismissive of concepts that aren't important to them.

[Lavemia]

Everyone will be fine with it.

[Gorganzan]

As long as you submit to government authority we dont care

[Upper Secundus]

We would find your lack of faith disturbing.