Here's an annoying niggle for anyone not using the English language
interface.

When uploading a file, you choose the language it's in from a drop-
down menu. This is arranged with "English" at the top, and all the
other languages in alphabetical order. So far so good.

But if I use a different language YouTube interface -- German, say --
the language names in the drop-down list are translated, but they're
still listed in the same order. That is, in alphabetical order of
their English translations.

So, while in English part of the list goes:

Byelorussian
Cambodian
Catalan
Chinese
Corsican
Croatian
Czech
Danish
Dutch

in German it goes:

Weißrussisch
Kambodschanisch
Katalonisch
Chinesisch
Korsisch
Kroatisch
Tschechisch
Dänisch
Niederländisch

This makes finding the right language extremely difficult.

Also, you forgot to translate "Select language".