The standard Japanese endings __じゃないか, __ではないか, and __じゃん can become __やん, __やんか/やんけ, and __がな respectively in Kansai-ben.
These Kansai sentence endings can also be used in the same way as __んだよ in standard Japanese.
There are many uses for these sentence endings; common ones are confirmation, excuses, accusation, notification, and persuasion. The function changes depending on the situation and tone. The __がな ending is used more often by older people.