ModRana is a flexible GPS navigation system for mobile devices. This is the main upstream modRana source code repository - waiting for your pull requests & patches! :)
This basically amounts to matching the direction languages supported by a routing backend to the languages supported by the TTS engines and exposing the result to the user to choose from. Let's just start with Valhalla for routing as it's both offline and also likely the best routing engine we have available.
Valhalla routing languages
Language tag | Language alias | Description
ca-ES | ca | Catalan (Spain)
cs-CZ | cs | Czech (Czech Republic)
de-DE | de | German (Germany)
en-US | en | English (United States)
en-US-x-pirate | pirate | English (United States) Pirate
es-ES | es | Spanish (Spain)
fr-FR | fr | French (France)
hi-IN | hi | Hindi (India)
it-IT | it | Italian (Italy)
ru-RU | ru | Russian (Russia)
sl-SI | sl | Slovenian (Slovenia)
5 af M afrikaans other/af
5 an M aragonese europe/an
5 bg - bulgarian europe/bg
5 bs M bosnian europe/bs
5 ca M catalan europe/ca
5 cs M czech europe/cs
5 cy M welsh europe/cy
5 da M danish europe/da
5 de M german de
5 el M greek europe/el
5 en M default default
2 en-gb M english _en (en-uk 2)(en 2)
2 en-gb M english en (en-uk 2)(en 2)
5 en-sc M en-scottish other/en-sc (en 4)
5 en-uk-north M english-north other/en-n (en-uk 3)(en 5)
5 en-uk-rp M english_rp other/en-rp (en-uk 4)(en 5)
5 en-uk-wmids M english_wmids other/en-wm (en-uk 9)(en 9)
2 en-us M english-us en-us (en-r 5)(en 3)
5 en-wi M en-westindies other/en-wi (en-uk 4)(en 10)
5 eo M esperanto other/eo
5 es M spanish europe/es
5 es-la M spanish-latin-am es-la (es-mx 6)(es 6)
5 et - estonian europe/et
5 fa - persian asia/fa
5 fa-pin - persian-pinglish asia/fa-pin
5 fi M finnish europe/fi
5 fr-be M french-Belgium europe/fr-be (fr 8)
5 fr-fr M french fr (fr 5)
5 ga - irish-gaeilge europe/ga
5 grc M greek-ancient other/grc
5 hi M hindi asia/hi
5 hr M croatian europe/hr (hbs 5)
5 hu M hungarian europe/hu
5 hy M armenian asia/hy
5 hy-west M armenian-west asia/hy-west (hy 8)
5 id M indonesian asia/id
5 is M icelandic europe/is
5 it M italian europe/it
5 jbo - lojban other/jbo
5 ka - georgian asia/ka
5 kn - kannada asia/kn
5 ku M kurdish asia/ku
5 la M latin other/la
5 lfn M lingua_franca_nova other/lfn
5 lt M lithuanian europe/lt
5 lv M latvian europe/lv
5 mk M macedonian europe/mk
5 ml M malayalam asia/ml
5 ms M malay asia/ms
5 ne M nepali asia/ne
5 nl M dutch europe/nl
5 no M norwegian europe/no (nb 5)
5 pa - punjabi asia/pa
5 pl M polish europe/pl
5 pt-br M brazil pt (pt 5)
5 pt-pt M portugal europe/pt-pt (pt 6)
5 ro M romanian europe/ro
5 ru M russian europe/ru
5 sk M slovak europe/sk
5 sq M albanian europe/sq
5 sr M serbian europe/sr
5 sv M swedish europe/sv
5 sw M swahili-test other/sw
5 ta M tamil asia/ta
5 tr M turkish asia/tr
5 vi M vietnam asia/vi
5 vi-hue M vietnam_hue asia/vi-hue
5 vi-sgn M vietnam_sgn asia/vi-sgn
5 zh M Mandarin asia/zh
5 zh-yue M cantonese asia/zh-yue (yue 5)(zhy 5)
(output of espeak --voices )
mimic TTS languages/voices
Voices available: ap slt kal awb kal16 rms awb_time
(output of mimic -lv)
It looks like it's rather voices with different pronunciation mechanisms rather than language specific voices.
pico TTS languages
German (Germany) de-DE Latin 1 (ISO 8859-1)
English (United Kingdom) en-GB Latin 1 (ISO 8859-1)
English (USA) en-US Latin 1 (ISO 8859-1)
French (France) fr-FR Latin 1 (ISO 8859-1)
Italian (Italy) it-IT Latin 1 (ISO 8859-1)
Spanish (Spain) es-ES Latin 1 (ISO 8859-1)
This basically amounts to matching the direction languages supported by a routing backend to the languages supported by the TTS engines and exposing the result to the user to choose from. Let's just start with Valhalla for routing as it's both offline and also likely the best routing engine we have available.
Valhalla routing languages
(from the Valhalla docs)
espeak TTS languages
(output of
espeak --voices)mimic TTS languages/voices
Voices available: ap slt kal awb kal16 rms awb_time(output of
mimic -lv)It looks like it's rather voices with different pronunciation mechanisms rather than language specific voices.
pico TTS languages
(from https://github.com/DougGore/picopi/blob/master/pico_resources/docs/SVOX_Pico_Manual.pdf)
flite TTS languages
Just English and some indic languages (?).