In order for programs to iGO-64 identify a compatible TTS voice, in the info.ini file of all xxx_TTS_voice.zip need the correct identification using this example:
tts_langname="lit-LTU"
Identification table:
Spoiler: table

asm-IND
ben-BGD
ben-IND
bos-BIH
brx-IND
bul-BGR
cat-ESP
ces-CZE
cym-GBR
dan-DNK
deu-DEU
doi-IND
ell-GRC
eng-AUS
eng-GBR
eng-IND
eng-NGA
eng-USA
est-EST
fil-PHL
fin-FIN
fra-CAN
fra-FRA
guj-IND
heb-ISR
hin-IND
hrv-HRV
hun-HUN
ind-IDN
isl-ISL
ita-ITA
jav-IDN
jpn-JPN
kan-IND
kas-IND
khm-KHM
kok-IND
kor-KOR
lav-LVA
lit-LTU
mai-IND
mal-IND
mar-IND
mni-IND
msa-MYS
nep-NPL
nld-BEL
nld-NLD
nob-NOR
ori-IND
pan-IND
pol-POL
por-BRA
por-PRT
ron-ROU
rus-RUS
san-IND
sat-IND
sin-LKA
slk-SVK
slv-SVN
snd-IND
spa-ESP
spa-USA
sqi-ALB
srp-SRB
sun-IDN
swa-KEN
swe-SWE
tam-IND
tel-IND
tha-THA
tur-TUR
ukr-UKR
urd-IND
urd-PAK
vie-VNM
yue-HKG
zho-CHN
zho-HKG
zho-MAC
zho-MYS
zho-SGP
zho-TWN