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I have developed a react application where I am using i18next, react-i18next, i18next-http-backend for localization.

In my application, I wanted to support only en-us language code for now and maybe will add further languages in the future, so I have added the below settings for i18n configuration.

import i18n from "i18next";
import backend from "i18next-http-backend";
import { initReactI18next } from "react-i18next";

i18n
  .use(backend)
  .use(initReactI18next)
  .init({
    lng: "en-us",
    fallbackLng: "en-us",
    debug: true,
    supportedLngs: ["en-us"],
    lowerCaseLng: true,
    interpolation: {
      escapeValue: false,
      formatSeparator: ","
    }
  });

export default i18n;

and placed the localization translation file at public/locales/en-us/translation.json. I have added supportedLngs because I want my i18next-http-backend should load only supported languages.

When I run the application I am getting a below warning

i18next::languageUtils: rejecting language code not found in supportedLngs: en

As per the document here:

I have also tried to set the nonExplicitSupportedLngs: true but then my translation file is not loaded and I am getting another weird warning as below:

i18next::languageUtils: rejecting language code not found in supportedLngs: en-us
i18next::languageUtils: rejecting language code not found in supportedLngs: en

How I can get away from the warning? am I missing something?

Thanks in Advance

I have developed a react application where I am using i18next, react-i18next, i18next-http-backend for localization.

In my application, I wanted to support only en-us language code for now and maybe will add further languages in the future, so I have added the below settings for i18n configuration.

import i18n from "i18next";
import backend from "i18next-http-backend";
import { initReactI18next } from "react-i18next";

i18n
  .use(backend)
  .use(initReactI18next)
  .init({
    lng: "en-us",
    fallbackLng: "en-us",
    debug: true,
    supportedLngs: ["en-us"],
    lowerCaseLng: true,
    interpolation: {
      escapeValue: false,
      formatSeparator: ","
    }
  });

export default i18n;

and placed the localization translation file at public/locales/en-us/translation.json. I have added supportedLngs because I want my i18next-http-backend should load only supported languages.

When I run the application I am getting a below warning

i18next::languageUtils: rejecting language code not found in supportedLngs: en

As per the document here: https://www.i18next./overview/configuration-options

I have also tried to set the nonExplicitSupportedLngs: true but then my translation file is not loaded and I am getting another weird warning as below:

i18next::languageUtils: rejecting language code not found in supportedLngs: en-us
i18next::languageUtils: rejecting language code not found in supportedLngs: en

How I can get away from the warning? am I missing something?

Thanks in Advance

• javascript
• reactjs
• i18next
• react-i18next

Share Improve this question Follow edited Apr 17, 2021 at 12:45 Nik asked Apr 17, 2021 at 12:21 NikNik 1,77711 gold badge2020 silver badges3939 bronze badges

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1 Answer 1

Sorted by: Reset to default 7 +50

Try to set the load option to “currentOnly” https://www.i18next./overview/configuration-options#languages-namespaces-resources

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