Native in Hungarian, she was able to interpret fluently in nine or ten languages (in four of them even without preparation). She translated technical literature and read in six languages. Kató Lomb was able to understand journalism in further eleven languages. As she put it, altogether she earned money with sixteen languages (Bulgarian, Chinese, Danish, English, French, German, Hebrew, Italian, Japanese, Latin, Polish, Romanian, Russian, Slovak, Spanish, Ukrainian). She learned languages mostly by self-effort, as an autodidact.
One of her most famous writings is Polyglot: How I Learn Languages.