javascript - NextJs 13 (i18n) Incorrect locale information provided - Stack Overflow

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I have been trying to use the NextJs i18n routing on a website Archive, but when I followed the exact steps provided in the documentation, I got this error: Incorrect locale information provided

I tried to debug it by checking the headers of the requests but it's all correct.

I tried to solve this by checking the error on console, reading related questions on stackoverflow Archive and GitHub Archive but without success.

I have been trying to use the NextJs i18n routing on a website Archive, but when I followed the exact steps provided in the documentation, I got this error: Incorrect locale information provided

I tried to debug it by checking the headers of the requests but it's all correct.

I tried to solve this by checking the error on console, reading related questions on stackoverflow Archive and GitHub Archive but without success.

• javascript
• http
• next.js13

Share Improve this question Follow edited Jun 10, 2023 at 19:03 a0m0rajab asked Jun 10, 2023 at 18:56 a0m0rajaba0m0rajab 49544 silver badges1717 bronze badges

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2 Answers 2

Sorted by: Reset to default 4

The issue is happening due to getting the language array as: [ "*" ] Which is not defined in the language that we have, I added an if condition to solve this issue:

    if (languages.length === 1 && languages[0] === '*') {
        languages = ['ar']
    }

Then followed the same steps in the documentation and it worked well.

I tried this on my middleware.ts and the issue is solved now:

const locales: string[] = i18n.locales;
  let languages = new Negotiator({ headers: negotiatorHeaders }).languages();
  if (languages.length === 1 && languages[0] === "*") {
    languages = ["en"];
  }

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