One of the examples I gave in Japanese was 綺麗くない which should be 綺麗じゃない (if you are familiar with Japanese).
Thank you. So is it right to summarize that the Japanese example was not 'wrong' in the general sense but rather 'not standard' and the examples I gave in English are not related? One of the examples I gave in Japanese was 綺麗くない which should be 綺麗じゃない (if you are familiar with Japanese).