I've been using this for some years now. No ads and the langs that I've tried have a selection of male and femail voices you can just play or d/l the mp3. There is now a so-called A'i' option, which is crap, but YMMV I suppose.
Supported voice languages:
Arabic, Australian English, Brazilian Portuguese, British English, Canadian French, Castilian Spanish, Chinese Mandarin, Danish, Dutch, French, German, Icelandic, Indian English, Italian, Japanese, Korean, Mexican Spanish, Norwegian, Polish, Portuguese, Romanian, Russian, Swedish, Turkish, US English, US Spanish, Welsh and Welsh English.
https://ttsmp3.com/text-to-speech/US%20Spanish/
