Sounds good, thanks for the suggestion! This should be relatively easy, as we have a reusable function for wrapping core ESLint rules.

Would you like to give it a try? See https://eslint.vuejs.org/developer-guide/#proposing-a-new-rule-or-a-rule-change.
You can take e.g. the vue/camelcase rule and its implementation as a base.

@FloEdelmann I didn't know there was a way to create custom rules. I'd like to try it, but it might take me a while to get to know it. I won't have time for that anytime soon, but maybe later I can help with the new rules. Thanks for the offer!

Note that we may need to exclude warnings within directives.

<tempalte>
  <img v-bind:title="$t(`foo`)" />
</template>

Hi, I just wrote a rule for this, but since it's only for my personal use, the test cases are not comprehensive and only consider quotes in mustache tags. I haven't considered quotes within directives. Maybe you can use it as a reference :)