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