"spread the word" is not a mark of your trade because it does not identify your business. Do you think it would cause brand confusion for other people to use t

"spread the word" is not a mark of your trade because it does not identify your business. Do you think it would cause brand confusion for other people to use that phrase in the social media context? It's just a common phrase you don't want other people to use in the same context they have been using it in for a long time.