Hi Igor,
In translation editor i.e. strings 'Vendor' and 'Vendor:' should be translated by one line in dictionary.
So if I have in dictionary:
'Vendor' 'Vyrobce',
strings like 'Vendor:' should be translated to 'Vyrobce:'. This is very common situation (column title w/o ':', edit title with ':').
Now I must have two lines in dictionary.