Which language is applied when scheduling import Items via FBDI

Summary:

Which language is applied when scheduling import Items via FBDI, the Default language or the Session language?

We think that "Default language" is applied regardless of which "Session language" is used when scheduling imports.

(We set the Default language as Japanese, so we think Japanese is used when the FBDI import is run even though we use English as a Session language when scheduling FBDI imports.)