Capitals for non-English sentences

These translations were modified in validators.py, and also in language
files.

'fill this'
'invalid expression'
'no match'
'no match'
'invalid expression'
'enter from %(min)g to %(max)g characters'
'invalid json'
'value not allowed'
'value not allowed'
'value not in database'
'value already in database or empty'
'value already in database or empty'
'enter a number between %(min)g and %(max)g'
'enter a number between %(min)g and %(max)g'
'enter an integer between %(min)g and %(max)g'
'enter an integer between %(min)g and %(max)g'
'enter a value'
'enter a value'
'enter only letters
'enter a valid email address'
'enter a valid email address'
'enter a valid URL'
'enter time as hh:mm:ss (seconds
'enter date as %(format)s'
'enter date and time as %(format)s'
'oops'
'enter date on or before %(max)s'
'enter date on or after %(min)s'
'enter date in range %(min)s %(max)s'
'enter date and time on or before %(max)s
'enter date and time on or after %(min)s'
'enter date and time in range %(min)s %(max)s
'enter between %(min)g and %(max)g values'
'must be slug'
'too short'
'too short'
'invalid image'
'enter valid filename'
'bad ip'
'enter valid IPv4 address'
'enter valid IPv6 address'
'enter valid IP address'