to tell the truth, to be completely honest, to be completely frank

so to speak, as it were

that is to say

attestation of truthfulness and frankness: to tell the truth, as a matter of fact

(impersonal) to go without saying

(transitive with sur) to speak volumes, to say it all

(idiomatic) to ring a bell / (literally) to say something

Alternative form of à vrai dire

(informal) to speak ill of, to cast aspersions on, to badmouth, to slag off, to backbite, to talk about (someone) behind their back [+ de (someone)]

(somewhat formal) according to