Multilang site: Auto redirect 301 or 302?

[fJ66doneOIdDpj]

We need to establish if 301 or 302 response code is to be used for our auto redirects based on Accept-Language header.

https://domain.com
30x > https://domain.com/en
30x > https://domain.com/ru
30x > https://domain.com/de

The site architecture is set up with proper inline HREFLANG.
We have read different opinions about this, Ahrefs says 302 is the correct one:
https://ahrefs.com/blog/301-vs-302-redirects/
302 redirect:
"You want to redirect users to the right version of the site for them (based on location/language)."

You could argue that the root redirect is never permanent as it varies based on user language settings (302)
On the other hand, the lang specific redirects are permanent per language:

IF Accept-Language header = en
https://domain.com > 301 > https://domain.com/en
IF Accept-Language header = ru
https://domain.com > 301 > https://domain.com/ru

So each of these is 'permanent'.

So which is the correct?

[Scottoffroad]

Hi Guys i am newer to SEO. my web with the 301 302 issue. anyone able help to fix it? will be high appreciated.

Internal URL
Yes
Full URL
https://myoffroadled.com/led-rocker-switch
HTTP status code
301 Moved permanently
First found at
Seed URL
Content type
text/html; charset=utf-8
Depth
0
Redirect URL
https://www.myoffroadled.com/led-rocker-switch/
Not crawled
Is redirect loop
No
Page rating
100

[Tom.Capper]

@fj66doneoiddpj In some cases users may have a reason for using the site in something other than their browser language.

For example, perhaps a shared device, or simply wishing to check a different localisation.

If your hreflang is working correctly, they should never see the "wrong" version anyhow.

But, there are pros and cons of course.

[fJ66doneOIdDpj]

Thank you for the reply, 302 is also what we decided after many hours of reading.
The main reason for auto redirect is that we feel it's a better user experience as user will arrive the content target to his/her browser language.

[Tom.Capper]

@fj66doneoiddpj

I would use a 302 here, just as an added insurance in case you ever accidentally serve Google the redirect.

However, I'm not a huge fan of auto redirects in general - they tend to cause issues for crawlers and users alike. Can you explain a bit more when/why the user gets redirected? Perhaps instead you could serve a country selection insterstitial if a user seems to be on the "wrong" variant?