"Du kan ikke besøge mig i fængslet."

Translation: You can't visit me in the prison.

[Flap]

This will for sure be super useful when I visit Denmark

[Timmy_The_Kid]

That's pretty sad....

[Klutz12]

Among the top 10 sentences I would prefer never to use

[Mattais]

The article here really isn't natural in English :/

[CharlotteN7]

No it isn't. I'm reporting it right now, it shouldn't be there in the English version.

[bamsetopper]

No, it's fine. "In prison" means generally, but "in the prison" refers to a specific facility. Whether it's a great translation I don't know, but it's not necessarily awkward.

[Linneascherer]

"No touching!" Also, this sentence sounds very awkward in English.

[Anna224987]

In British English, it should definitely just be "in prison". You would only possibly use "in the prison" if you had been talking about a specific institution, in which case you'd probably say "in this/that prison" anyway. I'm not sure about American English - it may be different.