Template:rfv-term/styles.css

.temp-rfv-term+[lang]:not(:hover) {
	text-decoration: line-through /*2px*/ rgba(0,0,0,0.80);
}

.temp-rfv-term+[lang]:hover {
	position: relative;
}

.temp-rfv-term+[lang]:hover::before {
  content: 'Can we verify this term?';
  position: absolute;
  top: 24px;
  white-space: nowrap;
  background: white;
  border: 1px dashed #999999;
  font-size: 0.8em;
}