Incorrect pluralization of words ending in "ion"

[beastbytes]

What steps will reproduce the problem? Pluralize a word ending in "ion", e.g.

$plural = $inflector->toPlural('nation');

What is the expected result?

$plural === 'nations';

What do you get instead?

$plural === 'natia';

Additional info

Q	A
Version	dev-master
PHP version	8.2
Operating system	Ubuntu