Koma letter script 2 environment labels in French instead of English

[Graham Smith]

If I add an environment such as "senderaddress" they appear in  
French.  Existing letter files use English labels, but if I add any  
new labels they are also in French.

This is with lyx 1.5.5 on OSx, any easy fix available.
Thanks,

Graham

Graham Smith
[EMAIL PROTECTED]