No. “Dollar General” is a trademark/proper noun, not a common noun. When pluralized, trademarks are typically paired with a common, pluralized noun since one is

No. “Dollar General” is a trademark/proper noun, not a common noun. When pluralized, trademarks are typically paired with a common, pluralized noun since one is typically referring to the mark’s owner entity. “Dollar General stores” “Dollar General brands” Common nouns with postpositive adjectives, in US English, have the noun pluralized: attorneys general, sisters-in-law, courts-martial, professors emeritus, accounts receivable.