When using casual expressions in text, there's a possibility that it might lead to a misunderstanding.
ご質問ありがとうございます。
「文章では[カジュアル](https://eikaiwa.dmm.com/uknow/questions/57103/)な表現を使うと誤解を招く可能性がある」は英語で「When using casual expressions in text, there's a possibility that it might lead to a misunderstanding.」と言います。
そして、例をあげたいなら、「For example, expressions such as "cool" and "check it out" might lead to the reader misunderstand the nuance of what you're trying to convey.
ご参考になれば幸いです。