Modify wording of bulk options

Question

I would like to modify the wording in the bulk actions on the posts screen or custom post types. I am trying to do so using the following code, but it's not working. Any idea why?

add_filter( 'bulk_actions-edit-post', 'my_custom_bulk_actions' );
function my_custom_bulk_actions( $actions ){
    $actions['trash'] = 'Just testing';

    unset( $actions[ 'edit' ] );
    return $actions;
}

Answer 1

There's currently no possibility to modify those. Just renaming it (the label in the UI only) via JS is possible.

I'd recommend to not try to modify those strings, as they equal action names and therefore are part of the query strings. You might break things easily. Figuring out what causes things to brake a half year later will just be a pain.

Answer 2

As far I know, That hook can only be used to remove particular action.

// This filter can currently only be used to remove actions.                              
$this->_actions = apply_filters( 'bulk_actions-' . $this->screen->id, $this->_actions );

^{Source - class-wp-list-table.php (Line - 282)}