LocaleMenu.vue

<template>

                <v-list subheader max-width="250">

                <v-subheader>{{$t("settings.locale")}}</v-subheader>
                <v-select rounded 
                          v-model="updateLocale"
                          prepend-inner-icon="language"
                          outlined
                          :items="locales"
                          dense>
                    </v-select>
                </v-list>
    
</template>

<script>
export default {
    data() {
        return {
            locales: [{text: "norsk (bokmål)", value: "nob"}, {text: "norsk (nynorsk)", value: "nno"}, {text:"english", value: "eng"}],
            localesMap: {"nob": "norsk (bokmål)", "nno": "norsk (nynorsk)", "eng": "english"},
        }
        
    },
    computed: {
        updateLocale: {
            get () { return {text: this.localesMap[this.$store.state.currentLocale], value: this.$store.state.currentLocale}}, 
            set(value) {
                this.$store.commit("setLocale", {value: value, i18n: this._i18n})
                }
        }
    },
}
</script>