Recently Apple is selling a new iPhone. You can talk to this iPhone and it will understand you. This video shows some of the things that the new iPhone can do.
For now, the new iPhone only uses English. You can't talk to it in Japanese yet. But, many Jpanese customers do not have good English pronunciation. Here are two videos showing their trouble talking to the iPhone.
So, pronunciation is very important. Please ask us if you have any questions about pronunciation.