[matiasb]

"An interesting variation is to be able to distinguish different languages in a text. E.g. a Dutch text with English quotes."

Do you know any interesting work related to the language distinction idea on the same text?

[microtonal]

I have never looked into that in detail. These may be some interesting leads:

http://mt-archive.info/IJCNLP-2008-Ehara.pdf http://202.41.85.68/knm-publications/lang_id_jql.pdf