Sorry mate, I don’t understand what the issue is.
I can see your previuosly attached image shows all custom fields in the wp_postmeta and you are able to select translations for them.
“with new fields created the field name is replaced with the field key.”
ACF saves it’s values with the field name (features_link), the field key will look something like field_123567 but this is not to be translated
Your image does show sub field items:
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