GrammarGrammar MistakesWord ChoicesWord Confusion Signalling Or Signaling: Which Spelling Is Correct? Both signalling and signaling are qzcorrect. The difference comes down to regional spelling, not grammar. Signalling, with two... Zunaira QasimOct 12, 2026Oct 12, 20263 Comments on Signalling Or Signaling: Which Spelling Is Correct?