If a foreiner asked me, I will answer them I speak "中文", if the national minorities ask me, I would say I speak "汉语", "中文" and “汉语" is the same language, both means the Chinese, but different names, for foreign and domestic non-Han people.

一般没有区别~ 能留下skype账号吗?希望进一步交流

中文=汉语

まじめ　すぎる　と思う　、怒ったら　ごめんなさい

I understood. Thank you so much everyone.