search for: 0007a

I've found a much better solution; it's standard (in Unicode itself), simple and more flexible: Unicode language tagging. It was made for just this purpose, in fact. A technical description is at http://www.unicode.org/unicode/reports/tr27/#tag which, like all specs, makes it sound a bit more complicated than it really is. It comes down to this: mark the language of text with U+E0001