God could have sent Ezekiel to impossible audiences, but He didn't. Why choose a 'hard language' for Israel?
This verse highlights a crucial distinction in God's mission assignments. God explicitly states Ezekiel is NOT being sent to 'many peoples of a strange speech and a hard language, whose words you cannot understand.'
The 'What If'
Imagine the sheer impossibility of Ezekiel being sent to diverse nations with languages he couldn't comprehend. It would be like sending someone to negotiate peace without any common ground for communication. God could have done this – He could have equipped Ezekiel with the gift of tongues, as He later did for the apostles.
The 'But'
However, God didn't. The mission is to the house of Israel, a people with whom Ezekiel shares a common language. This isn't to say their hearts were open or their understanding receptive, but the barrier of language was intentionally removed. This sets up a powerful contrast: if even foreign nations, with whom understanding would be a miracle in itself, would have listened, how much more should Israel, who speaks his language, listen?