[Anime-Keep] Nodame Cantabile

Terrible translation - swear words added when nothing vulgar was said in the original dialogue. Huge liberties taken - the MC is a lot more aggressive and insulting towards others than he should be etc.
Massive half-screen filling animated popup "translator notes" on the top of the frame, some of it several sentences long and some of it as bad as the infamous "keikaku means plan" line from Death Note. Except it's ten times more distracting because they literally pop up on screen with a colored border and then scroll out, like an advertisement on a webpage.