Translation exports all strings even when Built-in interface is selected

When i choose built-in interface and export translation, it contains translation of all my taxonomies and contents! This prevents me from contributing back my translations. How can i export only the Module and Core strings?
I don't know if it's a bug or not , but by Built-in interface the first thing came into my mind was Content is excluded.

I tried looking for alternative modules but i couldn't find anything.

Any idea?