私は「say」を使っています、、、
普段の会話では「say」が多い気がします、、、
あくまで個人の感想です。
例）
“They should have a big banner that says, 'We discriminate against motorcycles. You're not welcome.'”
〔Island Packet-Dec 11, 2017〕
“I have a cousin who fought in Desert Storm so that we could have the freedom to hang a banner that says, 'God bless America.'”
〔Fox News-Jun 30, 2016〕
“He brought me a banner that he'd made for me, a giant banner that says, 'Rise and Resist,'” Jones said of the last time he saw his friend.
〔San Francisco Examiner-Mar 31, 2017〕
回答は一例ですので、
あまり当てにしないでください
ありがとうございました
日本 
