The attached patch fixes the bugs in, cvsroot/moodle/lang/*/block_tag_youtube.php for: es, sr_lt, sr_cr, de, fr, tr Turkish.

Notes:

• I converted my Eclipse "lang" project to UTF-8 before creating the patch - hopefully OK!
• the YouTube block was only added in 1.9 Dev.
• this is not "Accessibility" per se, more "Standards".

This drives home for me - we need to address validation/semantics of language packs, particularly help files See related bug MDL-9890, "Help should be well-formed..."