My silverstripe website is not English. It is dutch. However the comment form has fields that always stay English. The "Posted by" area for example. and the Post your comment form.
In what file are these strings coded so i can change them to my language.
I have the same problem with a "User defined form". When i create a field that is required and the user of the site forgets to fill in that field. It always gives the warning in English.
These modules are not fully localized. Its all prepared from a SilverStripe framework perspective, but not implemented in all modules. As for the validation warning in user defined forms, these should be translatable in our current daily build - perhaps you want to give that a look (http://dailybuilds.silverstripe.com). Be aware that its pre-release, so not ready for production use.