Correct syntax is:
<wpml-config>
<custom-types>
<custom-type translate=”1″>hp_listing_attribute</custom-type>
</custom-types>
</wpml-config>
Now I’m able to translate Attributes (still don’t see it in Settings).
But even Attributes are assigned to language, I see ALL attributes in ALL languages for Listings in any language.
How to fix this bug?