Propagating 'fields' array programmatically in Sanity.io using groq queries and custom input widgets

fields: [
    {
      name: 'title',
      title: 'Heder Title',
      type: 'localizedString',
      description: 'Page header title'
    },
...],

const localizedString = {
  name: 'localizedString',
  type: 'object',
  inputComponent: GoogleTranslateInput,
  options: {
    apiKey: process.env.SANITY_STUDIO_GOOGLE_CLOUD_API_KEY
  },
  fieldsets: [
    {
      title: 'Translations',
      name: 'translations',
      options: { 
collapsible: true, collapsed: true }
    }
  ],
  fields: allLanguages.map((lang) => ({
    type: 'string',
    fieldset: lang.value === 'en' ? null : 'translations',
    options: {
      list: async () => {
        const selectedLangs = await languages();
        return allLanguages.map((lang) => !selectedLangs.includes(lang.value))
      },
      layout: 'string'
    },
  }))
};