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