Enhancement for Hunspell :

Improve the regular expression-like possibilities of conditional field of
affixes to identify the beginning of a word.

Of course, this recognition should be done with a circumflex (^) at the
beginning of a pattern.

In french, verbs which are roots of other verbs often have few different
conjugations than their derivative forms.

Example:
Verbs: mouvoir, émouvoir, promouvoir

SFX x2 N 51
SFX x2   ouvoir     û                   ^mouvoir        <---- here
SFX x2   ouvoir     u                   .mouvoir
[all other rules are the same for the three verbs]