I kickstarted a trial on the v8 beta and see following server message:
react-i18next:: It seems you are still using the old wait option, you may migrate to the new useSuspense behaviour.
v8.beta6
Following the simple example
Probably some more option to hide/disable the message or show an example with Suspense (even though I am not sure in NextJS environment about this)
I can confirm I'm seeing this in 7.0.1
Thanks @dohomi – this is fixed by #973.
Also, you can always pass your own config.react object if you want to override values.

For others stumbling into here, ensure react.wait is literally undefined or it would fail.
This will result in warning/break:
react: { wait: false, useSuspense: true }
While this will not,
react: { useSuspense: true }
Hey @axmachina, v8.0.0 has been released now, and this is fixed.
Note when using appWithTranslation with React Suspense as follows:
import { appWithTranslation } from 'next-i18next';
import React, { Component, Suspense } from "react";
const MyApp = ({ Component, pageProps }) => <Suspense fallback={"loading..."}><Component {...pageProps} /></Suspense>;
export default appWithTranslation(MyApp);
appWithTranslation can/will still fail as it sits outside Suspense.
To fix, consider moving appWithTranslation within Suspense like so
import { appWithTranslation } from 'next-i18next';
import React, { Component, Suspense } from "react";
const MyApp = ({ Component, pageProps }) => {
const TranslatedComponent = appWithTranslation(Component);
return <Suspense fallback={"loading..."}><TranslatedComponent {...pageProps} /></Suspense>;
};
export default MyApp;
As well, if you wish to avoid SSR rendering, use react/next dynamic:
export default dynamic(() => Promise.resolve(MyApp), {
ssr: false,
});
Most helpful comment
Thanks @dohomi – this is fixed by #973.
Also, you can always pass your own
config.reactobject if you want to override values.