Trouble translating events achive page

I have v 5.18.0 MEC plugin
My web is not visible because is a demo but is in two languages, spanish and euskera.
I have all the events translated and in Spanish the demo works perfect.
The trouble is only with the archive events page and it looks to be only in the euskera language version.
I have translate the mec-events slug, instead of “events” I use this ones:
agenda-eventos (spanish)
agenda-ekitaldiak (euskera)

If I navigate for the menu of the demo, the url link is ok in both cases but in euskera doesn′t show the correct content.
In the euskera version, the title is in spanish and is nothing more.

Do i need to activate something somewhere? Everything looks to be translated in the administration but the content in this case is not the correct one, only show the title and not in the correct language.

In other cases it works well for example, the single events are correctly translated and when I am in a single event view, if I click the link of his category, I go and can see all the events for that category in both languages, in spanish version the events in spanish and in euskera language version the events in euskera.
If I insert for example the Timeline View shortcode in any page to show some events, both languages show perfectly the content.
But in the events achive page doesn′t work, the spanish one works well (this is the first language) but the euskera language version only show the spanish title and nothing else.

If I use the same slug for mec-events, for example “agenda” it works.
It looks like the plugin is not using the translated slug, so if I use the same word, the same slug, it works.

Please, how can i fit it? Is it a plugin error?
I would like to use the translations for the slug, how can I do it?

Thanks.

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