english: What makes it seem real is that in actual languages, letters and groups of letters appear with consistent frequencies, and the language in the Voynich manuscript has patterns you wouldn't find from a random letter generator.
non_english: Stvarnim ga čini to što se u stvarnim jezicima slova i slovne grupe pojavljuju s doslednom učestalošću, a jezik iz Vojničevog rukopisa ima obrasce koji se ne zatiču kod nasumičnog generatora slova.