.sentence, .word, .word-translation, .word-original, .sentence-translation-req, .sentence-translation
{
  display: inline;
}
.word-translation, .sentence-translation { display: none }

.sentence       { background-colorx: #ff9; paddingx: 0.5em; font-size: 1.15rem; line-height: 2.5 }
.sentence:hover { background-colorx: #ffb }

.word-original:hover { background-color: #bbf; outline: 0.5em solid #bbf }

.sentence-translation-req { position: relative; background-color: #cf9 }
.sentence-translation-req:hover .sentence-translation
{
  position: absolute;
  display: inline-block;
  background-color: #faf;
  background-color: #cf9;
  padding: 0.1em 1em;
  right: -15vw; bottom: 4ex; width: 30vw;
  border: thin solid black;
}
.word:hover .word-translation
{
  position: absolute; transform: translate(-0.5em,-5ex);
  display: inline; width: max-content;
  background-color: #bbf;
  padding: 0.1em 0.5em;
}