en_tn/gen/43/29.md

he lifted up his eyes

This means "he looked up." (See: rc://en/ta/man/translate/figs-idiom)

his mother's son, and he said

This can be translated with a new sentence. Alternate translation: "his mother's son. Joseph said"

Is this your youngest brother ... me?

Possible meanings are 1) Joseph is truly asking a question to confirm that this man is Benjamin, or 2) it is a rhetorical question. Alternate translation: "So this is your youngest brother ... me." (See: rc://en/ta/man/translate/figs-rquestion)

my son

This is a friendly way one man speaks to another man of lower rank. Alternate translation: "young man"