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