die Klage

lawsuit against sb. (legal)

a formal lawsuit against sb. — the legal sense

Er erhob Klage gegen seinen ehemaligen Arbeitgeber.

He filed a lawsuit against his former employer.

wogegen?dagegen

complaint about sth.

an everyday complaint about sth. — not a lawsuit

Es gab viele Klagen über die schlechte Bedienung.

There were many complaints about the poor service.

worüber?darüber