Is it allowed to use other tags inside ?

Question

Is it correct practice or valid syntax to use other tags inside a <title>?

An example for multi-language title

<html lang=en>
<title>Some title in English and a <i lang=fr>word in French</i></title>

chelmertz · Accepted Answer

See http://www.w3.org/TR/html401/struct/global.html#h-7.4.2:

Titles may contain character entities (for accented characters, special characters, etc.), but may not contain other markup (including comments).

(my emphasis)

Matt Tew · Answer

No, it may not

http://www.w3.org/Provider/Style/TITLE.html

Is it allowed to use other tags inside <title>?