(For some reason the site wouldn't let me submit this as a proper tag implication request because the antecedent is allegedly already taken. I'd assume it was because the implication already exists, but based on both the wiki pages and the fact that dialogue -text returns hundreds of pages of results, this doesn't appear to be the case. If I did something wrong, please let me know.)
The wiki page for dialogue identifies it as a kind of text, and excludes both voice_acted and pictographics as dialogue. Logically, therefore, anything with dialogue has text in it. So I submit dialogue should implicate text.