Translate Strings with gettext

add_filter( 'gettext', 'bp_resume_manager_strings', 20, 3 );
/**
 * Change comment form default field names.
 *
 * @link http://codex.wordpress.org/Plugin_API/Filter_Reference/gettext
 */
function bp_resume_manager_strings( $translated_text, $text, $domain ) {


        switch ( $translated_text ) {

            case 'Professional Experience' :

                $translated_text = __( 'Sports Experience', 'bp-resume-manager' );
                break;

            case 'This group contains fields which will appear in Professional Experience section.' :

                $translated_text = __( 'This group contains fields which will appear in Sports Experience section.', 'bp-resume-manager' );
                break;

    }

    return $translated_text;
}