Problem with the translation of the emails

Good morning,

I am using Email Before Download in a multilingual web created with PolyLang. Everything works correctly except sending emails. I want to get that depending on which language they fill in the CF7 form the email will arrive in that language.

I have tried translating the strings manually with PoEdit creating the .MO for each language and I have also tried with LocoTransalate.

But in all ways, the mail is always sent in Spanish, the main language of the web.

Any suggestions?

Thank you.