How to translate the comments form from post pages

Do anyone know how can I translate the whole comment form from post pages?

Thanks in advance
Carme

have you used a .po file?

Hi,
no, I didn't know about that.
Do I need to import a .po file from WP in catalan? such as twentyten.ca.po ??
how can I do that ?

Sorry for not knowing about that already

thanks again,
Carme

you might find one in yout language in the Languages & Translations forum