Like others have said, "foreigners" is not a bad word, but the negative association is sometimes that those people aren't wanted. If you are talking about many nationalities, you can use the term that describes why they are in the country instead. For example, "exchange students," "expats," "tourists," and "immigrants."

"Foreigners" is not a bad word but sometimes can take on a negative connotation, especially if a country recently had an issue with them. It gives off too much "us vs them" connotation. You can substitute other phrases like "(our) overseas guests" or "visitors from overseas". It will likely sound less cold and businesslike than "foreigners".

English provides the word foreigner, but I like to kid my friends by referring to them as "aliens". The idea becomes interesting in other languages, for example, Chinese. "Foreigner" in Chinese means literally "outside country person", so I kid my Chinese friends by asking them whether they would become 外国人 when they travel abroad. Some of them do not think that's funny.

The word foreignet means one is from a different country. I am a foreigner when Inam in a country other than my own. We are becoming too politically correct. The word means that one is from a different country.

In the United States, where our current leadership has demonstrated extreme xenophobia, the term "foreigner" is frowned upon in more educated circles. As many have commented below, it has taken on a negative connotation due to its usage. I use the term "international" if I don't know where the person is from, but otherwise, I use their nationality when referring to the other person and only if it's necessary to do so. I understand those who complain we are becoming too politically correct and I agree that we can take things a bit too far sometimes in that area, but as someone who works with people entering as refugees, "foreigner" sounds unwelcoming.