Translation of "Innit" in Japanese

It's a great plan, innit.

すごく良く練られた計画じゃん。

- Beautiful day, isn't it?
- Beautiful day, innit?

すばらしい天気ですね。

- It's cool this morning, isn't it?
- It's cool this morning, innit?

今朝は涼しいですね。

- It is hers, is it not?
- It's his, isn't it?
- It's his, innit?

それは彼女のですね。

- English is difficult, isn't it?
- English is difficult, innit?
- English is hard, isn't it?

英語は難しいですね。