Hello...

@kostostavr no problem... here you are... tts_nua_ve1
two engines (Nikos - Melina) only greek:
Spoiler: Link
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but remember that these voices differ a little in some points into info.ini

nua_ve_lang_dir="grg" <--- engine folder
tts_engine="nuance_ve1" <--- choice engine instead "android"

voice_model="full_vssq5f22" Nikos <--- choice model voice (male or female)
voice_model="full_155mrf22" Melina