nuxt-i18n not working in production

Version

nuxt-i18n: 6.12.2 nuxt: 2.12.2

Nuxt configuration

mode:

• universal (pwa)
• spa

Nuxt-i18n configuration

i18n: {
  strategy: 'prefix_except_default',
  defaultLocale: 'en',
  locales: [
    {
      code: 'en',
      iso: 'en-GB',
      name: 'English',
      file: 'en-GB.json',
    }, {
      code: 'de',
      iso: 'de-CH',
      name: 'Deutsch',
      file: 'de-CH.json',
    },
  ],
  vuex: {
    syncLocale: true,
    syncMessages: true,
  },
  // seo: true,
  lazy: true,
  langDir: 'assets/lang/',
},

Steps to reproduce

The problem is, that in a component, used in the layout (basically <layout><my-component></layout>) I use the this.$t('something') translation method and the this.$i18n. When running nuxt in development mode, everything works fine, but as soon as I run the application (NO CHANGES MADE) in production mode (nuxt build --pwa && npm run start) the app fails with following error: “o.localeRoute is not a function” (seems to be a problem in the renderer?). When having a look at the console, there is an error with following message: “Cannot read property ‘locales’ of undefined”. The property that is tried to be read is this.$i18n and in dev mode it has the locale property.

What is Expected?

To work same as in development mode (running nuxt)

What is actually happening?

The application doesn’t work anymore

PS: I had a look at following Issues/SOs: Why nuxt-i18n module doesn’t seem to be loaded? ( _vm.$t is not a function) #24 #43 #45 #58 #84 #137 #139 <- This one also happend to me, but as you see, i have my default locale set… #166 #173

I also asked my question on the community discord.

So I’m really desperate…