en_tn/gen/10/19.md

border

"territory" or "border of their territory"

from Sidon, in the direction of Gerar, as far as Gaza

The direction south can be stated explicitly if needed. AT: "from Sidon city in the north as far south as Gaza town, which is near Gerar" (See: rc://en/ta/man/translate/figs-explicit)

as one goes toward Sodom, Gomorrah, Admah, and Zeboyim, as far as Lasha

The direction "east" or "inland" can be stated explicitly if needed. AT: "then east toward Sodom, Gomorrah, Admah, and Zeboyim towns, as far as Lasha" (See: rc://en/ta/man/translate/figs-explicit)

These were the sons of Ham

The word "these" refers to the people and people groups who were listed in verses Genesis 6-19.

by their languages

"broken up according to their different languages"

in their lands

"in their homelands"