[Resolvido] Pingback link does not have /pl/

Background of the issue:
I am trying to ensure that pingback links on my English posts from the Polish site include '/pl/'. Please take a look here: link oculto and all the English posts with pingback links from the Polish site.

Symptoms:
The text 'Masaż tantryczny - jak odróżnić profesjonalistę od naciągaczy? - Anahata Tantra Temple' is expected to link to link oculto, but it links to link oculto and redirects to the English page.

Questions:
Why does the pingback link not include '/pl/'?
How can I ensure the correct link structure for pingbacks?