'Speech' in the Bible

For you are sent to the house of Israel, not to a people {of obscure speech} and {of a difficult language},

[and] not to many nations {of obscure speech} and {a difficult language} {whose words} you do not understand, [for] if I had sent you to them they would have listened to you.

And you magnified yourself against me with your {insolent speech}, and you spoke voluminously against me [with] your words--I heard!