Improve SEO: new browser detection mode: `onlyOnCookie`

[husayt]

Is your feature request related to a problem? Please describe.

There were a number of SEO related changes in recent releases. onlyOnRoot has improved things greatly, but sometimes even more restrictive mode is needed, especially if no_prefix default language is not english. So for this reason we want to disable detectBrowserLanguage if there is no cookie set (to make sure crawlers are not redirected.)

Describe the solution you'd like

add a new mode to detectBrowserLanguage - onlyOnCookie. This will behave in a following way:

• if cookie set it will use that cookie as default language
• if no cookie set it will use prefix ( or no prefix as a default) to detect language (set this as a cookie for next visit)

[divine]

Hello,

onlyOnNoPrefix option probably does everything you've asked?

Thanks!

[husayt]

Hi, onlyOnNoPrefix is even less restrictive than onlyOnRoot. I am looking for opposite.

İ don't want any browser detection if there is no cookie set. Basically that will make sure that crawlers are not affected.

Thanks

[rchl]

What you want is to basically never detect browser language but only use the cookie to store the last-used one. So that wouldn't really belong in detectBrowserLanguage object, I feel.

And in that case you can probably just implement that logic yourself by storing the cookie on page load if not set and restoring locale from cookie if set.