localePath or localeStructure does not work as expected

[ivoba]

Hi,
i am having a hard time figuring out how to change the path and filename of the translation file.
I tried both options described in the docs but both do not seem to work.
Desired output is: public/locales/{namespace}.{locale}.json

I am using

    "next": "13.1.1",
    "next-i18next": "^13.0.2",
    "react-i18next": "^12.1.1",

localeStructure
So i left localPath on default and changed localeStructure
i18next-parser.config.js:

module.exports = {
  i18n: {
    locales: ['de', 'en'],
    defaultLocale: 'de',
    localeStructure: '{{ns}}.{{lng}}'
  }
}

This works only if i also keep files in the default dirs like:
public/locales/de/common.json
then it would pick up values from:
public/locales/common.de.json

If only having the latter it says: i18next::translator: missingKey de common header.logo.claim header.logo.claim

But files should not be double, this feels rather wrong.

localePath
I added a function as localePath adn i receive other errors;

module.exports = {
  i18n: {t
    locales: ['de', 'en'],
    defaultLocale: 'de',
    localePath: (locale, namespace) => (`./public/locales/${namespace}.${locale}.json`),
  },
}

Yields this error:

Error: Must provide all namespaces in ns option if using a function as localePath

Adding a namespace list manually somewhere feels also rather wrong.

And even if i add ns: ['common'], i get another error:

Error: Error serializing ._nextI18Next.userConfig.i18n.localePath returned from getStaticProps in "/".
Reason: function cannot be serialized as JSON. Please only return JSON serializable data types.

What am i missing here?

[ivoba]

So at least i got the serialization working now with following the docs with serializeConfig: false,
https://github.com/i18next/next-i18next#unserializable-configs

export default appWithTranslation(App, nextI18NextConfig);

But still having to add all namespaces manually still seems to be cumbersome.

[adrai]

Having a custom localeStructure that is not listable requires also to have the ns option defined. v13.0.3 will error now if not done so.
With the default localeStructure next-i18next tries to automatically preload all namespaces of the appropriate language... basically ls {{lng}}
But with a localeStructure like yours this is not possible.