Qurds12

data:() ({
hasText: false
})

meathods: {
showText() {
this.hasText = true
}

hideText() {
this.hasText = false
}
}

<div class="flag flag--ru" @mouseover="showText" @mouseleave="hideText">
      <svg>
         <use xlink:href="@/assets/svg/svg.svg#flag-ru"></use>
       </svg>
</div>

<p v-if="hasText">any text</p>