Most nouns ending in -o add -es to form the plural (with some exceptions like photo/photos).
Chicago is regular. It follows the -es Addition rule.
Use plural verbs: "The chicagoes are ready" (not "is ready").
Yes. The plural chicagoes is standard across all English variants.
The word chicago follows the standard English pluralization rule. When forming the plural, chicago becomes chicagoes. This follows the -es Addition pattern, which is one of the most common plural rules in English.
Understanding why chicago becomes chicagoes helps with spelling and pronunciation. Most nouns ending in -o add -es to form the plural (with some exceptions like photo/photos).
When using chicagoes in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The chicagoes are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.