Background of the issue:
I am trying to auto-translate products into certain languages using WPML, but I am unable to do so for some languages, such as Bulgarian.
Symptoms:
We are unable to auto-translate products into some languages, e.g., Bulgarian.
Questions:
Why can't I auto-translate products into Bulgarian?
What could be causing the auto-translation to fail for certain languages?
In the bottom section, you will find details about enabled translation engines and their preference order and also you can find a section for language mappings. Make sure that Bulgarian is mapped properly and try again.