I use both Persian characters and English in meta-description & title tag and I'm wondering if I can use span tags?
<meta name="description" content="The movie is Italy Italy - <span dir='rtl'>فیلم جدید</span>">
<title>The movie is Italy Italy - <span dir='rtl'>فیلم جدید</span></title>
The span tags define the direction e.g. <span dir='rtl'></span> for Persian characters.
You cannot include elements inside attribute values.
The start-of-element special character < does not have its usual special meaning there and is treated as a literal less-than symbol.
The <title> element may not contain child elements either.