Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Nationality is regular. It follows the -ies Conversion rule.
Use plural verbs: "The nationalities are ready" (not "is ready").
Yes. The plural nationalities is standard across all English variants.
The word nationality follows the standard English pluralization rule. When forming the plural, nationality becomes nationalities. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why nationality becomes nationalities helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using nationalities in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The nationalities are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.