Some Cities in Rio Grande do Sul (but in the remainder of the state speakers may or may not utilize it in more official speech), predominantly close to the border with Uruguay, have a slightly unique pronunciation in some cases (tu vieste turns into tu viesse), that's also current in https://prospectuso.com/userinfo.php?mod=space&com=profile&userinfo=angie.tijerina.451692&do=profile&op=userinfo