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