In some dialects the past tense of “bring” is “brang,” and “brung” is the past participle; but in standard English both are “brought.”

Why do people say Brang instead of brought?

(In Old English, bring was bringan.) By late Middle English, the modern brought gains its title as "Past Tense and Past Participle of Bring," and the only "real" (they're a tag team born from analogy) contenders to take it away have, historically, been brang and brung.

Is Brang a word?

Brang has never been accepted as a word in dictionaries but it is in common use in spoken English as the past simple form of Bring. The correct form according to dictionaries is Brought. When you are learning English, you need to learn the past simple and past participle forms of verbs.