I've added a Lookup in my email to retrieve the language of the customer but, despite there is data, the function doesn't retrieve anything (I tried with different values or Data Extensions but with the same result).
%%[
VAR @SubKey, @EmailAddress, @language
SET @EmailAddress = emailaddr
SET @SubKey = _subscriberkey
SET @language = Lookup("Account_Salesforce","Language__pc","PersonContactId",@skey)
]%%
I tried performing a real email sent instead of the test and preview but no success either.
ent.
prefix:"ent.Account_Salesforce"
?