Nouns ending in -a (often Latin or scientific) add -e to form the plural.
Russia is regular. It follows the -ae Addition rule.
Use plural verbs: "The russiae are ready" (not "is ready").
Yes. The plural russiae is standard across all English variants.
The word russia follows the standard English pluralization rule. When forming the plural, russia becomes russiae. This follows the -ae Addition pattern, which is one of the most common plural rules in English.
Understanding why russia becomes russiae helps with spelling and pronunciation. Nouns ending in -a (often Latin or scientific) add -e to form the plural.
When using russiae in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The russiae are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.