It is important to confirm digit entries with callers.
Confirming single digit entries
In order for the system to speak back digits for confirmation, you must ensure that there is a recorded phrase associated with each digit. IVR Designer will supply the phrase tags for these digits, and allow you to record them. You can also use enhanced basic speech, in the language of your choice, to speak back digits.
Confirming digit sequences
With non-US English languages, the only reliable way to speak caller numeric entries back to them is as a series of digits, rather than a natural number. For example, a caller that speaks "one-hundred, twenty-three" will hear their input read back as "one two three." This should be adequate for most applications.