Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
* filename -- original name of the file.
* genre -- <self-evident>.
* language -- main language in which the work is performed, preferably
- * in ISO 639-2 format.
+ * in ISO 639-2 format. Multiple languages can be specified by
+ * separating them with commas.
* performer -- artist who performed the work, if different from artist.
* E.g for "Also sprach Zarathustra", artist would be "Richard
* Strauss" and performer "London Philharmonic Orchestra".