ESV: not to many peoples of foreign speech and a hard language, whose words you cannot understand. Surely, if I sent you to such, they would listen to you.
NIV: not to many peoples of obscure speech and strange language, whose words you cannot understand. Surely if I had sent you to them, they would have listened to you.
NASB: nor to many peoples of unintelligible speech or difficult language, whose words you cannot understand. But I have sent you to the people who understand you;
CSB: not to the many peoples of unintelligible speech or a difficult language, whose words you cannot understand. No doubt, if I sent you to them, they would listen to you.
NLT: No, I am not sending you to people with strange and difficult speech. If I did, they would listen!
KJV: Not to many people of a strange speech and of a hard language, whose words thou canst not understand. Surely, had I sent thee to them, they would have hearkened unto thee.
NKJV: not to many people of unfamiliar speech and of hard language, whose words you cannot understand. Surely, had I sent you to them, they would have listened to you.