[espeak-ng:master] New Comment on Issue #825 Hebrew is not supported
mbrola-hb2 packages are data files for completely different MBROLA sound synthesizer. eSpeak NG can be used as a "front end" for it to do text-to-phoneme translation for MBROLA. Though it doesn't have configuration files for Hebrew. See more at MBROLA Voices
I can create initial settings for it, but to make it usable, improvements will be needed by native speaker.