raise a warning when nwords differs in input/output

[mmmaat]

• Sometimes with the espeak backend, two words can be merged in a single token. Or can be simply dropped.
• At the phonemizer level we can do nothing but to warn the user...
• So do it: count words before and after phonemization. Warn on difference, if word separator is not None.

[shreeshailgan]

@mmmaat what is the solution to this? Is there an option to avoid merging of two tokens?

[mmmaat]

Hi, there is nothing we can do at the phonemizer level, because the information is lost by espeak. The only thing we can do is to warn users (see the woords-mismatch option).