Overwrite t() to record missing translations

[robov]

I would like to overwrite the t function in my app.js to record missing translations.
In the past (vue2) i created a Vue.prototype.$t = function (...args) {} that did the checking and finally called the i18n.t() to return some value
However I have no clue how to do this in vue3

The most I am struggeling how do I catch a call like
import { useI18n } from "vue-i18n"; const { t } = useI18n(); t('hello')
and redirect it to a function function and return the result of the translation
mytranslate(...args) { return i18n.t(args) }
When this is working I can record the missing translations etc.
Any suggestions are highly appreciated

[robov]

partial answer...
I can do this to catch the call from within my main application

        VueApp
            .use(plugin)
            .use(i18n);

        i18n.global.t = customTranslate; 

But when another npm package does:

import { useI18n } from "vue-i18n";
const { t } = useI18n();
t('hello);

Then the original is called and not the customTranslate

[noah-nuebling]

I believe the replacement for Vue.prototype.$t is app.config.globalProperties.$t. If you override that it should have the same effect (I haven't tested this and am no expert)