As far as I know, the only Itadaki Street games that were translated are Itadaki Street Special (PS2) and Itadaki Street Portable (PSP)...
My main goal is to work on a translation of Itadaki Street 3 (PS2) which is for me the best of the series!
There has been some work on the DS Itadaki Street both in English and in some other language, but neither were ever finished sadly... or any version of their work released. I'm super thankful for the PS2 and PSP translations though--I actually first discovered the series on the DS and with no Japanese knowledge, figured out how to play it. I've since come to love the series, and am glad we got Fortune Street. Hopefully a 3DS version comes out someday!
I'd love to see your work on Itadaki Street 3 come about some day. The more Itadaki Street, the better!