Investigate if we can modify the terms retrieved by this metabox.
See if the metabox uses the get_terms function (we have a get_terms filter) or if we can use pre_get_terms.
The focus is filter the terms by language meta field as we do with post types.
If we can't modify the metabox we'll need remove it and create a clone with those filters.
get_terms
function (we have aget_terms
filter) or if we can usepre_get_terms
.The focus is filter the terms by language meta field as we do with post types.
If we can't modify the metabox we'll need remove it and create a clone with those filters.