This is the 313th most frequent Bulgarian word.
език
"Език" in English means "language" or "tongue."
In this context, 'език' is used in the plural form 'езици' to refer to ancient languages as systems of communication from the past.
Ученият изучаваше древните езици.
The scholar studied ancient languages.
Here, 'език' means 'tongue', referring to the physical organ in one's mouth.
Той си прехапа езика, за да не каже нещо обидно.
He bit his tongue to avoid saying something offensive.
In this sentence, 'език' means 'language' and refers to the Bulgarian language as a communication system.