There's nothing wrong with this sentence of mine, isn't it?

What do you mean by 'talked rudely'?

fivejedjonWhat do you mean by 'talked rudely'?

Dad and Mom used foul language when they talked to each other.

Rommel fivejedjonWhat do you mean by 'talked rudely'?Dad and Mom used foul language when they talked to each other.

Then say that.

I don't know if it would be fine if I say, While eating together, Dad and Mom talked to each other, using foul language. Could you suggest any expression any other expression, perhaps an adverb, for using foul language, which can make the sentence shorter?

Is While eating together, Dad and Mom talked obscenely to each other about drugs grammatically acceptable?

Rommelobscenely

That is the wrong adverb. What do you mean?

Dad and Mom used foul language when they talked to each other.

RommelDad and Mom used foul language when they talked to each other.

That is fine, but I don't see what it has to do with conversations about drugs—that is the odd part.

RommelDad and Mom used foul language when they talked to each other.

Say that, as I said before.

But, fivejedjon, would it be OK if I add the phrase about illegal drugs at the end of the sentence Dad and Mom used foul language when they talked to each other? I really have to mention in the sentence the topic of their conversation which is illegal drugs.