This is the list of currently supported languages. For detail description and development status of each language, please see here.
en standard default English voice
en-sc Scottish English.
en-r American English (not quite).
en-n/en-rp/en-wm various British accents (Northern, Received Pronunciation, West Midlands)
af Afrikaans
bs Bosnian
cs Czech
de German
el Greek
eo Esperanto
es Spanish
fi Finnish
fr French
hr Croatian
hu Hungarian
it Italian
pt Portuguese (Brazil)
pt-pt Portuguese (European)
ro Romanian
sk Slovak
sr Serbian
sv Swedish
sw Swahihi
cy Welsh
grc Ancient Greek
hi Hindi
is Icelandic
jbo Lojban
la Latin
mk Macedonian
nl Dutch
no Norwegian
pl Polish
ru Russian
vi Vietnamese
zh Mandarin Chinese
zhy Cantonese Chinese