one speech
Genesis 11:1
11:1 one speech. Literally, “of one lip and one set of words”–that is, one phonology and one vocabulary, the same language as spoken by the antediluvians. This may well have been the Hebrew language, or some similar Semitic language since the primitive records were transmitted through Noah and Shem and since it is very unlikely that either Noah or Shem were participants in the rebellion and judgment at Babel.