en_tn_condensed/ezk/03/06.md

of strange speech or a difficult language

"who speak a strange or difficult language"

not to many peoples of strange speech

"I am not sending you to a mighty nation whose people speak a strange language"

if I sent you to them, they would have listened to you

This is a hypothetical situation that could have happened but did not. Yahweh did not send Ezekiel to people who did not understand his language. (See: rc://en/ta/man/translate/figs-hypo)

if I sent you to them

The word "them" refers to a mighty nation other than Israel.