improve translations in SK bootstrapvalidator lang file
improve translations in SK bootstrapvalidator lang file

SlovakNationalGallery/web-umenia-2,rastislav-chynoransky/web-umenia-2,rastislav-chynoransky/web-umenia-2,SlovakNationalGallery/web-umenia-2,SlovakNationalGallery/web-umenia-2,rastislav-chynoransky/web-umenia-2,SlovakNationalGallery/web-umenia-2