Why do I see 我 for I, but is pronounced WAH I'm corrected to pronounce WAH instead of "wǒ."

Is it the same and I just hear it wrong in my head? Or is there a difference in dialect?
I made a little search in forvo.com, a worldwide database that hosts user-provided audios for words, characters and expressions in every language.
Making a quick search for 我, the results reveal several entries. The obvious ones Chinese and Japanese and others; among the others we have Min nan (Simpl: 闽南语; Trad: 閩南語; pinyin: Mǐnnán Yǔ), which is a family of Chinese language spoken in: China (PRC and ROC areas), Malaysia, Indonesia, Singapore, Thailand, Philippines, Vietnam, United States (New York City), and other areas of Southern Min and Hoklo settlement.1
If you go to the &quot;results&quot; link, and scroll down until you find &quot;min nan&quot;, you'll see it's pronounced &quot;wah&quot;. It's unambiguous, it's pronounced very open so you can't be mistaken when you find it. I checked the others and no-one else seems to say &quot;wah&quot;.

1: definition, chinese version and locations are taken from Wikipedia.