Feed to Post and WPML work very well together, allowing you to import content into a language of your choice, as well as assign imported objects to language-specific categories.
Setting the Language of Imported Posts
When Feed to Post detects that WPML is activated on the site, it will add the following option when creating/editing feed sources:
The languages listed here are the same languages that you have enabled in WPML.
Assigning Language Specific Categories
Setting the language using the option shown above will not change which categories are listed in the “Feed to Post – Taxonomies” section.
The categories shown here are determined by the currently selected language in WPML, which can be changed from the admin bar:
The language chosen here will change which categories are shown in the taxonomy options.
The images below demonstrate this. The first shows the English categories, while the second shows the Spanish categories. Notice the language selected in the admin bar in each image.