How to speak with southern bad japanese accent?

[kentaku_sama]

We're currently working on a amatuer movie based off a lame show we've done for 5 years.　The main character talks with a southern Tennessee Accent with very bad grammar for example:

"I ain't got nothin"
"I already done did that"

The movie will have Japanese Subs because some of my friends online want to watch it but I don't know how to make the character sound southern and bad grammar in japanese. My best guess would be

何でもないや　
もうしたあったや　　

Those are probably wrong though.　 　

[Ongakuka]

I think 'I ain't got nothin' should be something more like おいら、何も持ってないよ if it refers to objects or 何も知らん if it refers to information

I'm not saying those are right either, but 何でもない sounds more like 'It's nothing' (i.e 気にしない)

Some characters that fit your description tend to end sentences with だ where you aren't supposed to, I think it's meant to give off a kind of country-bumpkin feel. Anyway that sounds interesting

[NileCat]

「おら、なんも持ってねえだ」／「おら、なんもわかんねえ」
「もう とっくにやっただよ」

[Ongakuka]

Thanks Nilecat

[kentaku_sama]

ありがとうございます　NileCatさん、 Subsを訳しを手伝わなければいけない。 　

[vonessa]

Funny idea. I guess maybe figure out which prefecture in Japan has the most "country" or not from the city accent, and see what words they use...