How to use this.Maybe some issue.

[Mosquito1123]

/// number of songs plural
String numberOfSongsAvailable(int count) => Intl.plural(count,
zero: 'No songs found.',
one: 'One song found.',
two: '$count songs found.',
few: '$count songs found.',
other: '$count song found.',
many: '$count songs found.',
name: 'numberOfSongsAvailable',
args: [count],
desc: 'number of songs plural');

/// currency dolars
String amountDollars(int count) => Intl.plural(count,
one: '$count Canadian dollar',
other: '$count Canadian dollars',
name: 'amountDollars',
args: [count],
desc: 'currency dolars');

[Mosquito1123]

"""Intl.defaultLocale = "pl";
await initializeMessages(Intl.defaultLocale ?? "pl");

final l10n = L10n();

print(l10n.title);
print(l10n.login);
print(l10n.singleArgument('arg'));
print(l10n.twoArguments('arg1', 'arg2'));

// plurals
print(l10n.numberOfSongsAvailable(0));
print(l10n.numberOfSongsAvailable(1));
print(l10n.numberOfSongsAvailable(2));
print(l10n.numberOfSongsAvailable(5));
print(l10n.amountDollars(9));""" Plurals has no output.