Just a side note, it seems that by default the only installed voices are in English, that's why setting it to Spanish fails. After installing the Spanish voices with festbox-ellpc11k, the following command works:
echo "Buenos días" | festival --tts --language spanish
Just a side note, it seems that by default the only installed voices are in English, that's why setting it to Spanish fails. After installing the Spanish voices with festbox-ellpc11k, the following command works:
echo "Buenos días" | festival --tts --language spanish