I know how to translate a non-internationalized WordPress theme. However, I have a WordPress/Buddypress theme which has already buddypress translations, like for instance:
<h1 class="pagetitle"><?php _e( 'Page Not Found', 'buddypress' ) ?></h1>
I'd like to add some new translations inside this theme, but POedit gives me all the chains which the theme contains for translating, whereas these chains are already translated via the Buddypress mo file.
So my question is: how to make POedit identify only the new words I've added ? I chose a specific text domain for my additional translations, but how to make POedit selects only this domain chains ?