i18n object is not typed at all in V12

After updating to v12 and following the instructions here, I get the following TS errors:

const {i18n} = useTranslation();

i18n.language
i18n.changeLanguage
^^^ TS2339: Property 'language' does not exist on type 'i18n'.
error TS2339: Property 'changeLanguage' does not exist on type 'i18n'.

and in the initialize function, as well

i18n.use(initReactI18next).init({
   // ...
});

TS2339:  Property 'use' does not exist on type 'typeof import("/Users/me/project/src/i18next")'.

But those properties are clearly there when you console.log(i18n), along with lots of others. It appears that the i18n object returned by useTranslation has not been typed at all.

How do I set up the i18next.d.ts file so that the i18n object returned by useTranslation() is properly typed?

[billorer]

Hello guys, I have the same issue: Versions I use: "i18next": "22.0.5" "react-i18next": "12.0.0" "typescript": "3.9.10"

Is there any solution?

[Kretiss]

@pedrodurek I have this problem too.

i18n.ts file

import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';
import csGlobal from './config/i18n/cs.json'
import skGlobal from './config/i18n/sk.json'

export const defaultNS = 'global';
export const resources = {
  cs: {
    global: csGlobal,
  },
  sk: {
    global: skGlobal,
  }
} as const;

const options = {
  // lng: '', user.language
  fallbackLng: 'cs',
  ns: ['global'],
  load: 'languageOnly',
  interpolation: {
    escapeValue: false,
    formatSeparator: ',',
  },
  defaultNS,
  resources,
}

i18n.use(initReactI18next)

if (!i18n.isInitialized) {
  i18n.init(options)
}

export default i18n

i18next.d.ts file

import 'i18next';
import { resources, defaultNS } from './i18n';

declare module 'i18next' {
  interface CustomTypeOptions {
    defaultNS: typeof defaultNS;
    resources: typeof resources['cs'];
  }
}

Both files are under src directory in app

And it complains about this

detailed info:

TS2339: Property 'use' does not exist on type 'typeof import("/Users/tomaskretek/inQool/som.inqool.cz-client/node_modules/.pnpm/i18next@22.0.5/node_modules/i18next/index")'.

TS2339: Property 'isInitialized' does not exist on type 'typeof import("/Users/tomaskretek/inQool/som.inqool.cz-client/node_modules/.pnpm/i18next@22.0.5/node_modules/i18next/index")'.

TS2339: Property 'init' does not exist on type 'typeof import("/Users/tomaskretek/inQool/som.inqool.cz-client/node_modules/.pnpm/i18next@22.0.5/node_modules/i18next/index")'.