Access to router.currentRoute... outside of the component in VUEJS

Hello, I don't have a lot of experience in VUEJS and in JS itself, so I probably got stuck on a seemingly trivial topic.

In a word of explanation, the project is a SPA application that communicates with the backend via REST API and is based on VITESSE (boilerplate VUE3 + Typescript + Pinia + composition API ....)

Since the application will be quite complex, I decided to create an abstract layer for communication over HTTP.

In connection with the above, I created a folder / src / api and in it another files with methods divided into groups that perform specific queries via axios (as below)

import type { AxiosInstance, AxiosRequestConfig } from 'axios'
import axios from 'axios'
import { router } from '~/main'


const axiosInstance: AxiosInstance = axios.create({
  baseUrl: import.meta.env.API_URL,
  headers: {
    'Content-type': 'application/json',
    'Authorization': 'Bearer ' + 'TOKENXXXXXXXXXXXXX',
    'Language': router.currentRoute.value.params.lang,
  },
})

async function axiosCall<T>(config: AxiosRequestConfig) {
  try {
    const { data } = await axiosInstance.request<T>(config)
    return [null, data]
  }
  catch (error) {
    return [error]
  }
}

export async function sendMessage(formData) {
  return axiosCall<void>({ method: 'post', url: '/send-message', data: formData })
}

DESCRIPTION OF THE PROBLEM

In "headers" I would like to put the currently selected language by the user (from the URL) into the backend:

'Language': router.currentRoute.value.params.lang,

the only problem is that the router is probably "uninitialized" at this point.

Even though I'm on the url / en / contact, router.fullPath shows "/" and router.currentRoute.value.params is an empty object

however, if I do something like this in the above file:

async function getLang () {
  await router.isReady ()
  console.log ('routerLang:', router.currentRoute.value.params.lang)
}

getLang ()

then, of course, "routerLang: en" appears on the console

Of course, the workaround is to extract the language from the "window.location.href" available at this stage, but this is for sure bad solution

How should I deal with such problems?

Regards and thank you in advance