Tzar: The Burden of the Crown was released in some countries with four additional campaigns:

Tzar: El Cid y la Reconquista (only in Spain)
Translated: El Cid and the Reconquista*
*http://en.wikipedia.org/wiki/Reconquista

Tzar: El Rey Arturo y Excalibur (only in Spain & Italy)
Tzar: Excalibur e il Re Artù
Translated: King Arthur and the Excalibur

Tzar: El Imperio de Gengis Khan (only in Spain & Italy)
Tzar: L'Impero di Gengis Khan
Translated: The Empire of Gengis Khan

Tzar: Los Dominios de la Magia (only in Spain)
Translated: The Domains of Magic

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To be fair with the publisher (FXInteractive) I will just post the links to download two of the expansions:

El Cid y la Reconquista
[MediaFire] Download (audio & text - Spanish)

Los Dominios de la Magia
[MediaFire] Download (audio & text - Spanish)

The other two expansions you can get from the publisher's site:

El Imperio de Gengis Khan (Free)
Download Page (translated to English)
Direct Download (audio & text - Spanish)
Direct Download (only text - Spanish)

DRM-Free Tzar: El Poder de la Corona + El Rey Arturo y Excalibur
Purchase (~1dolar)

Sorry for doing this but I feel the moral obligation to do so. If you visit their site you will see the care they put in their distributions.

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<span class="bold">Presentation of El Cid y la Reconquista</span> (translated to English)
[url=http://translate.google.com/translate?hl=pt-PT&sl=es&tl=en&u=http%3A%2F%2Fwww.fxinteractive.com%2Fp004%2Fespecial%2Ftzarturo.htm ]Presentation of El Rey Arturo y Excalibur (translated to English) [/url]
<span class="bold">Presentation of El Imperio de Gengis Khan</span> (translated to English)

<span class="bold">European Units</span> (translated to English)
<span class="bold">Asian Units</span> (translated to English)
<span class="bold">Arabian Units</span> (translated to English)
<span class="bold">Other Units</span> (translated to English)

<span class="bold">European Buildings</span> (translated to English)
<span class="bold">Asian Buildings</span> (translated to English)
<span class="bold">Arabian Buildings</span> (translated to English)

<span class="bold">Extra Content - missions, etc.</span> (translated to English)

Excellent work, man. +1.

Good job. Well done. +1

Oh snap I had no clue they were translated!

Beast.

So...any chance for these in English? :(

Read the OP :]

Also, what a fantastic find- this game is incredibly enjoyable, making it longer would only be awesome. Thanks, pedromiguel83!

That doesn't help.

I was hoping GOG would in some time update the game with the above campaigns IN ENGLISH either as a patch or an updated installer.

Aw hope sometime that might be able to happen, thank you for the consideration!

Necroing' this thread, this should be a sticky, as the additional campaigns are currently unavailable in the GOG executable...

Are these expansions still missing from the game here on GOG? Or has it been updated?

Hey guys anybody knows where i can find these campaigns in english ?

It looks like they were only released in Spanish, but I'm taking a stab at translating the campaign of the Reconquista. Hopefully I'll have it ready by next week, and I'll drop a link in the forums.

For the sake of eternity, somebody, give him some reputation points already! Two years passed and we still don't have a translated campaign! It is a shame developers didn't translate other campaigns at least to English in the first place.

Anyway, I've rated both your posts. Can you please send me a link with private message, or maybe after two years you have enough points to post a link here? Thanks in advance!