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Thanks for your reply TukTown.

The website is in 4 languages. English, French, Dutch and German.
Google support states you can target a language only, without specifying a region:
"
Supported language/region codes

The value of the hreflang attribute identifies the language (in ISO 639-1 format) and optionally a region (in ISO 3166-1 Alpha 2 format) of an alternate URL. (The language need not be related to the region.) For example:

de: German language content, independent of region
    en-GB: English language content, for GB users
    de-ES: German language content, for users in Spain
"

We are targeting the Dutch language in two different countries. (Belgium and The Netherlands)

The issue I'm raising is that all hreflang-tags, plus the canonical tag, are pointing to the same URL.

Will bots be able to identify the correct language with this mark-up?

Supported language/region codes

The value of the hreflang attribute identifies the language (in ISO 639-1 format) and optionally a region (in ISO 3166-1 Alpha 2 format) of an alternate URL. (The language need not be related to the region.) For example:

• de: German language content, independent of region
• en-GB: English language content, for GB users
• de-ES: German language content, for users in Spain

Hi,

Does anyone know whether hreflang links can be used using the following markup?

I can't seem to find any info on this particular usage, but it "feels" incorrect to me. (duplicate content issues)
Our development team tells me this is the way the markup should be, since languages are initially set using a cookie and all different languages are using the same URL.

Thanks!

<link rel="<a class="attribute-value">alternate</a>" href="<a class="attribute-value">https://www.littlethingz.be</a>" hreflang="<a class="attribute-value">nl</a>"/><link rel="<a class="attribute-value">alternate</a>" href="<a class="attribute-value">https://www.littlethingz.be</a>" hreflang="<a class="attribute-value">x-default</a>"/><link rel="<a class="attribute-value">alternate</a>" href="<a class="attribute-value">https://www.littlethingz.be</a>" hreflang="<a class="attribute-value">fr</a>"/><link rel="<a class="attribute-value">alternate</a>" href="<a class="attribute-value">https://www.littlethingz.be</a>" hreflang="<a class="attribute-value">en</a>"/><link rel="<a class="attribute-value">alternate</a>" href="<a class="attribute-value">https://www.littlethingz.be</a>" hreflang="<a class="attribute-value">de</a>"/>