vueJS mixin trigger multiple times in laravel 5.7

I am new in Vue jS [version 2]. There are 3 component in my page. I want to use a axios get data available in all pages. I have done as follows in my app.js

const router = new VueRouter({mode: 'history', routes });
Vue.mixin({
data: function () {
        return {
          pocketLanguages: [],

        }
    },
mounted() {
       var app = this;
       axios.get("/get-lang")
            .then(function (response) {
                app.pocketLanguages = response.data.pocketLanguages;
        })
    }
})

const app = new Vue({ 
    router,
}).$mount('#app');

and using this pocketLanguages in a component like

this. Its working fine but My Issue is axios.get('') triggering 4 times when page load [in console]

Now how can I trigger this only once or anything alternative suggestion will be appreciated to do this if explain with example [As I am new in Vue]

via Chebli Mohamed