Translation issue

This is a nice plugin, thank you!

But I’m having problems with the translations into Spanish. Some of the strings are shown in English, even though the translation is in the corresponding file.
For example, in the Documents tab I can see some of the strings in Spanish, but most of them are in English:

Viewing item 1 to 3 (of 3 items) >> in English
Uploaded by miembro1 on 12 de enero de 2023. >> in English
0 descargas desde entonces. >> this is translated into Spanish.

On the email notifications happen the same:

miembro1 uploaded a new file: Test 3 to the group: Grupo 1.

To see miembro1’s profile: …. >> English

To see the group Grupo 1’s homepage: …. >> English

To download the new document directly: …. >> English

Para desactivar estas notificaciones por favor ve a: …. >> This is translated into Spanish.

Any idea why this is happening?

Thanks in advance, regards.