I believe in the justice, but nobody understand me.

我相信正义，但是没有人理解我。

youdao

Finland is a small country. Population is five million and we speak Finnish that nobody understand outside. Compared to China all dimensions are different.

芬兰是一个小国，人口只有五百万，我们说着别人听不懂的芬兰语，与中国相比，两国各个方面都不一样。

youdao

I was in a terrible state because nobody could understand why I had this illness.

我极度不安，因为没人能明白我为什么得了这种病。

《柯林斯英汉双解大词典》

Nobody can understand you."

没人能理解你说的是什么“

耶鲁公开课 - 文学理论导论课程节选

In the first place, these people they are behaving in a way - in a manner that nobody can understand.

NPR: Businesses Hit Hard by Turmoil in Kenya

And nobody could understand what the statement said.

NPR: Client Learns Madoff Returns Worthless

Her unease lasted through the introductions of two elderly Russian couples, two elderly Chinese couples, three middle-aged Dominican couples, one handsome young Haitian man, one very tall, very old, and very loud Haitian woman with a funny name Oolna and one dark-skinned woman who spoke so fast and with such a heavy accent that nobody could understand what she said or where she came from.

NEWYORKER: Luda and Milena