You asked: " is it possible to auto duplicate all the variations attributes in missing language ?"
Do you mean to ask: is it possible to auto-duplicate variation attributes that are missing to all languages?
If so, then please check this tool to see if it does what you are asking:
Woocommerce > Woocommerce Multilingual > Status > Troubleshooting > Duplicate Terms
Are you asking that this be done anytime you create a new term?
Or is this one-time-tool good enough?