The use of 'Het' is not always correct, sometimes it should be 'De', so the sentence would look weird. Probably better to remove it.
Also, the 'exists' string stated it already exists, but should state it doesn't exist! Very important difference ;)
Also changed the formatting errors of email/url to be more specific.
added validate_array/count/countmin/countmax/countbetween -
corresponding replace_count/countmin/countmax/countbetween message
functions - corresponding validator error messages into all language
files (please have maintainers update their language files) - also
converted spaces to tabs in the polish language file to fit all the
others.