Incorrect Spanish translation of content in "Delete link" editor of "External link editor"

Pre-conditions:

1. User is registered and logged.
2. User has Admin permission for Jcommune.
3. Administration mode is enabled
4. At least one created link exists in External link editor

Steps to reproduce:

1. Select the Spanish language in the top right
2. Open "External link editor"
3. Click on the "Delete" button in front of the existing link
4. Confirmation dialog "Delete link" is opened
5. View the inner content of the dialog

Content for Spanish language:
Actual result: "¿Estás seguro de que deseas eliminar el enlace <the name of the link>?"
Expected result: "¿Estás seguro de que deseas eliminar el enlace <the name of the link>?"

See error displaying in attachment.