In English the 'list seperator' is a comma, in french is is a
simecolon. Excel uses this character to determine where to begin a new
column. When in regional settings choose 'customize' and look on the
tab 'numbers' The second option from below determines what character
is used to seperate list elements.
Regardless of that you can have Excel split the data correctly. Look
at the option Data/Text to columns

DQ