Yes, IF your machine came pre-installed like my newest portable (dec 2007) was.
My portable had a pre-installed 4 language Vista-installer and an image (iso
file) of a 4 language recovery DVD. With a full recovery to its original
condition, I could pick an other language (NL, FR, DE or EN)
If you have a single language recovery partition/DVD, then the answer to
your question is No.