No one likes short answers, but nobody reads long answers. What is the best length for an answer?

In which ports of the Black Sea can we find older people that still speak Greek?

Pontic Greek is still spoken in the Of valley, Turkey by Muslims who remained after the population exchanges.

Their Pontic Greek is distinctive in retaining Ancient Greek /uk/ for “not”; Christian Pontic had truncated it to /kʰ/.

Did Hebrew affect all languages in the world? If so, is it the only language that affected all languages?

… The only wide-ranging influence of Hebrew I can think of is

  • In the variants of languages that are spoken by Jews: Yiddish, Ladino, Judaeo-Greek, Judaeo-Persian, Judaeo-Arabic… for all I know, Judaeo-Chinese.
  • In the church register of languages impacted by Christianity. And not a lot of words there. Amen, Satan and Sabbath are probably the most wide-ranging ones.

Be careful not to conflate Hebrew with other Semitic languages. In Greek, arrabōn for “pledge; (later) engagement” dates from Classical times; that means it’s not Hebrew, it’s Phoenecian. The same is likely true for camel, which was used by Herodotus.

Both Jews and Christianity spread widely, but the lexical impact of Hebrew, I’d say, is surprisingly superficial. English, Greek and Latin have gotten around a lot more.