I had read some comments label China a self proclaimed superpower.

我看过关于中国自己宣称是超级大国的评论。

youdao

One of the prisoners is a self-proclaimed racist who opened fire on a crowd four years ago.

其中一名囚犯恬不知耻地自称是种族主义者，他曾在四年前向人群开枪射击。

《柯林斯英汉双解大词典》

He is a self-proclaimed racist.

他自称是种族主义者。

《柯林斯英汉双解大词典》

Unfortunately, as described by Craig A. Hunter, a self proclaimed "pretty dedicated iPhone developer" who's been poking around the WebOS SDK, Palm does not provide the environment to develop serious games or the kind of sophisticated apps users now expect from their handhelds.

ENGADGET: webOS SDK bemoaned by iPhone developer as Palm seeks game API engineers

Sussman, a self-proclaimed Communist is a member of the anti-American Students for Democratic Society.

CENTERFORSECURITYPOLICY: Convenient moral blindness

Lanvin, under the direction of designer Alber Elbaz, a self-proclaimed L.A. admirer, opened a shop last year.

WSJ: Insider's Travel Guide to Los Angeles | Journal Concierge