Weird code shown on product short description

[JacoboPS]

(First, sorry if this is not the correct place to ask this, please feel free to move it to the right section)

I have a weird and desperating problem... that I don't know where is comming from.

When you access this product page (I have entered a white space betten "1001" and "especias" to avoid Google indexation, please remove when pasting the url)

https://www.1001 especias.com/es/cola-de-caballo
https://www.1001 especias.com/es/hoja-eneldo-granel-100g

You can see on the descripcion this text, right under the short description, this code...:

Cola de caballo
100 gramos
VMSHIPMENT_WEIGHT_COUNTRIES_SHIP_TOSpain
With shipment Envío a domicilio (toda España) for 5,40 €
Precio

And if you see the cart ICON, it has a product added!! but when visiting the cart, it is empty.

I have tried cleaning cookies (and tried both mozilla and firefox), cache, etc. but nothing works!!

And this doesn't happen with other products! 

for example....  https://www.1001 especias.com/es/cardamomo-verde-grano-100grs


(any idea will be welcome!!)

[PRO]

cart adds for me.

& the
VMSHIPMENT_WEIGHT_COUNTRIES_SHIP_TO    is a language string.
You can change it via the language manager.

[JacoboPS]

cart adds for me.

But, why only with certain products??

& the
VMSHIPMENT_WEIGHT_COUNTRIES_SHIP_TO    is a language string.
You can change it via the language manager.

Sorry my ignorance, but, what do I have to change? this looks like a problem not a configuration option. And again, why does it happen with some products only?

Thank you!

[PRO]

add the language string like shows here.

https://www.ostraining.com/blog/joomla/languge-manager/

It is just a missing language string.