Сохраняйте разрывы линий в Textarea
// preserve line breaks ( \n -> <br> )
$_translated_text = nl2br($_original_text);
Cheerful Cockroach
// preserve line breaks ( \n -> <br> )
$_translated_text = nl2br($_original_text);
<p style="white-space:pre-warp">multi-line text</p>white-space: pre-wrap