You can try this by using meta query to filter results and then adding orderby to order results. Below arguments should work
$args = array(
'post_type' => array('post', 'video'),
'meta_key' => 'pp_like_count',
'orderby' => 'meta_value_num',
"meta_query" => array(
array(
"key" => "pp_lang",
"value" => "english",
"type" => "CHAR",
"compare" => "="
),
),
);