captcha not shown when using lang parameter

[cluster]

There seems to be a problem when using multiple languages with the captcha protection part ...
It only works when clientarea.php is used without language parameters in the URL:
/clientarea.php

the Captcha module is not shown when using language parameters like:
/nl/clientarea.php
/fr/clientarea.php

my rewrite rules (installation folder is clients):

#force lang fr
RewriteRule ^fr/(.*).php?(.*)#(.*) /clients/$1.php?$2&language=french#$3 [NC,L,QSA] 
RewriteRule ^fr/(.*).php?(.*) /clients/$1.php?$2&language=french [NC,L,QSA] 
RewriteRule ^fr/(.*).php#(.*) /clients/$1.php?language=french#$2 [NC,L,QSA] 
RewriteRule ^fr/(.*).php$ /clients/$1.php?language=french [NC,L,QSA] 
RewriteRule ^fr/$ /clients/index.php?language=french [NC,L,QSA] 
RewriteRule ^fr/(.*) /clients/$1 [NC,L,QSA]

 

[cluster]

I think i have found a solution ...
can i use these rewrites, are they correct & safe?

RewriteRule ^en/clientarea.php(.*)$ /clients/clientarea.php?language=english [R=301,NC,L]
RewriteRule ^fr/clientarea.php(.*)$ /clients/clientarea.php?language=french [R=301,NC,L]
RewriteRule ^de/clientarea.php(.*)$ /clients/clientarea.php?language=german [R=301,NC,L]