Casual Conversation

Germany:
"Airplane" = The Incredible Journey On A Crazy Airplane
Then there's The Incredible Journey On A Crazy Spaceship (original "Airplane II: The Sequel")
and The Outragious Journey On A Crazy Bus (original: "The Big Bus", in no way related to the other movies)

But one scene in the first movie is even funnier than the original in the German dubbed version: https://www.youtube.com/watch?v=TEkI0cH_rK4
(The 2 black guys speak a thick Bavarian dialect, which is the closest thing in Germany to Hillbilly slang. The subtitles say something completely different)

Brazilian translation studios have a fair bit of those:

Those four are representative examples because they don't just adapt the original title; they do it without regard of what the original title is conveying, just to throw it into a "this is a movie title!" template.

Not that bad, but there was a serious lack of creativity:
The Shining - Hotel of Evil
House on the Haunted Hill - House of Evil

Oh, I have a doozy for ya. I've got a beauty!

THELMA & LOUISE
in theaters in Mexico, back in the early 90s
was
(wait for it...)
UN FINAL INESPERADO (AN UNEXPECTED ENDING)

Seriously... how dumb do you think your audiences are if you feel the need to hold their hand and spoon-feed them like this? This is taken to a level that doesn't make sense anymore, the so-called "solution" is so much worse than the perceived "problem".

Book and Movie "To Kill a Mockingbird" is translated in German to "Wer die Nachtigall Stört" - "To disturb a Nightingale".

They were like "something, something with a bird- close enough."

This bothered me even before reading the book, but after reading the scene in the backyard where Miss Maudie explains to the kids that you never shoot at a mockingbird because they do no harm to anyone or anything ever, a metaphor the whole book is build on, this translation drives me crazy.

I wish someone would re-publish it with a more fitting german title.

I'll start with a classic: in French "the Hangover"has been changed to "Very bad trip"

Swedish translators have largely stopped translating titles as the population nowadays are essentially all competent enough English speakers. But back in the day, there were some... let's say questionable choices. Sadly many of them are based on word play and translate poorly back to English. Superman III was translated into an absolutely atrocious Kryptonite pun, for example. I wish I could do it justice.

It Could Happen To You being translated as Cop gives waitress a $2 million tip is one of my other favourites - just a mundane summary of the plot with zero zest or punch.

It was also decided for some reason to name the entire Mel Brooks catalogue as Springtime for X after The Producers was first translated as Springtime for Hitler (which at least makes sense - that is part of the movie!). I think the worst offender is Springtime for the History of the World part 1 (History of the World part 1) - but they're all bad.

There was also a trend for a while to randomly add sub-titles to movies - such as Crocodile Dundee: a big game hunter in New York.

Finally, it amused me greatly that The Sound of Music was translated as Sound of Music - still in English, just dropping the article.

ゴジラ (go・ji・ra) somehow got turned into "Godzilla".

(I'm a native English speaker living long-term in Japan, so I'm not sure which "your language" goes here, but English names of Japanese movies seems like the better bet).

The Shawshank Redemption in Finnish: Rita Hayworth - avain pakoon. (=key to freedom). Only a minor spoiler...

"Wild Things" was translated to "Sex Crimes" in France "Body of Evidence" to "Body" "The Hangover" to "Very Bad Trip"

Hmm I can't think of others right now, but translating English title to other (Often bad) English titles was a mood in France at some point

Japan tends to go for very descriptive titles in media. My favorite one of these is when Pixar's Up became Old Man Carl's Flying House.

Most InuYasha episode titles sound like first draft fairy tale titles.