Can we use other communication system to register Voice Alarm Module besides cisco CUCM?
And how can voice module support other languages such as Japanese and Chinese (We have factorys there)？
Sure you can, here's how to connect to some popular ones like Amazon Chime, Grandstream HT-503 and HT-813. I think whatever service you decide to go with just needs to be capable of SIP.
As for supporting other languages, one suggestion would be to take a look at the configuring messages portion of the user manual for voice notifications. But according to this source, seems like they only have voices for English, Italian, Spanish, French and German.