Vlaky
Vlaky is the Czech plural noun meaning “trains,” derived from the root word vlak, which itself comes from the Latin word vulgus meaning “mass” or “people.” The term is used in everyday Czech speech to refer to both passenger and freight locomotives that operate on the national rail network. It appears in a variety of contexts, from informal conversation (“He caught a vlak to Prague”) to official documents and timetables (“Vlaky s přestupem”). In Romance languages, the cognates are similar, for example “trains” in French or “trenes” in Spanish, indicating a common Indo‑European heritage.
Historically, the word entered Czech usage in the 19th century with the arrival of the first railway
In the broader Slavic linguistic set, "vlak" and its plural form appear in Croatian (“vlaky”), Polish (“pociągi”