espeakup: Voice change after Ctrl+F7 => Crtl+F2 if it is not a language

[Didier Spaier]

Hello,

Context:
espeakup and espeak-ng from git master.
kernel 4.19.24 

espeakup being started by a startup script like this:
ALSA_CARD=PCH espeakup -v fr-fr 
espeak-ng speaks with a French voice, as expected
I log in and type startx in tty1
Then I press:
Ctrl+Alt+F7 # Mate is started
Ctrl+Alt+F2 # log in as regular user
Now espeak-ng speaks with an English voice.

This doesn't happen if espeakup is started like this:
ALSA_CARD=PCH espeakup -v fr

Why does the voice change, and why only in the former case?

I have seen this commit:
https://github.com/williamh/espeakup/commit/ee099174d849e32bf7b555e458963d27f84c64b2
"Allow a voice to be selected by language name"
but do not know if/why this could be related to that. 
 
Best,

Didier