eSpeak Speech Synthesizer

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## 3. LANGUAGES

#### Help Needed

Many of these are just experimental attempts at these languages, produced after a quick reading of the corresponding article on wikipedia.org. They will need work or advice from native speakers to improve them. Please contact me if you want to advise or assist with these or other languages.

The sound of some phonemes may be poorly implemented, particularly [r] since I'm English and therefore unable to make a "proper" [r] sound.

A major factor is the rhythm or cadance. An Italian speaker told me the Italian voice improved from "difficult to understand" to "good" by changing the relative length of stressed syllables. Identifying unstressed function words in the xx_list file is also important to make the speech flow well. See Adding or Improving a Language

#### Character sets

Languages recognise text either as UTF8 or alternatively in an 8-bit character set which is appropriate for that language. For example, for Polish this is Latin2, for Russian it is KOI8-R. This choice can be overridden by a line in the voices file to specify an ISO 8859 character set, eg. for Russian the line:

         charset 5

will mean that ISO 8859-5 is used as the 8-bit character set rather than KOI8-R.

In the case of a language which uses a non-Latin character set (eg. Greek or Russian) if the text contains a word with Latin characters then that particular word will be pronounced using English pronunciation rules and English phonemes. Speaking entirely English text using a Greek or Russian voice will sound OK, but each word is spoken separately so it won't flow properly.

Sample texts in various languages can be found at http://<language>.wikipedia.org and www.gutenberg.org

### 3.1 Voice Files

A number of Voice files are provided in the `espeak-data/voices` directory. You can select one of these with the -v <voice filename> parameter to the speak command, eg:

       espeak -vaf

to speak using the Afrikaans voice.

Language voices generally start with the 2 letter ISO 639-1 code for the language. If the language does not have an ISO 639-1 code, then the 3 letter ISO 639-3 code can be used.

For details of the voice files see Voices.

#### Default Voice

default
  This voice is used if none is specified in the speak command. Copy your preferred voice to "default" so you can use the speak command without the need to specify a voice.

### 3.2 English Voices

en
  is the standard default English voice.

en-us
  American English.

en-sc
  English with a Scottish accent.

en-n
en-rp
en-wm
  are different English voices. These can be considered caricatures of various British accents: Northern, Received Pronunciation, West Midlands respectively.

### 3.3 Voice Variants

To make alternative voices for a language, you can make additional voice files in espeak-data/voices which contains commands to change various voice and pronunciation attributes. See voices.html.

Alternatively there are some preset voice variants which can be applied to any of the language voices, by appending `+` and a variant name. Their effects are defined by files in `espeak-data/voices/!v`.

The variants are `+m1 +m2 +m3 +m4 +m5 +m6 +m7` for male voices, `+f1 +f2 +f3 +f4 +f5` for female voices, and `+croak +whisper` for other effects. For example:

       espeak -ven+m3

The available voice variants can be listed with:

       espeak --voices=variant

### 3.4 Other Languages

The eSpeak speech synthesizer does text to speech for the following additional langauges.

af Afrikaans
  This has been worked on by native speakers and it should be OK.

bs Bosnian
  Usable, but I'm unsure whether wrong stressed syllables are a problem. It accepts both Latin and Cyrillic characters. This voice is similar to sr Serbian and hr Croatian

ca Catalan

cs Czech
  Usable.

da Danish
  Usable.

de German
  This has improved from easlier versions. A problem is stress placement (which like English is irregular), prosody, and the use of compound words where correct detection of the sub-word boundaries would probably be needed for accurate pronunciation.

el Greek
  Stress position is marked in text and spelling is fairly regular, so it shouldn't be too bad. It uses a different alphabet and switches to English pronunciation for words which contain Latin characters a-z.

eo Esperanto
  Esperanto has simple and regular pronunciation rules, so it should be OK.

es Spanish
  Spanish has good spelling rules, so it should be OK.

es-la Spanish - Latin America
  This contains a few changes from es, notably the pronunciation of "z","ce","ci".

fi Finnish
  This has had assistance from native speakers and should be usable.

fr French
  This has been improved by a native speaker, and should be OK.

hr Croatian
  Usable, but I'm unsure whether wrong stressed syllables are a problem. It accepts both Latin and Cyrillic characters. This voice is similar to sr Serbian and bs Bosnian

hu Hungarian
  This has had assistance from a native speaker and it should be OK.

it Italian
  This has had some feedback from a native speaker but more work is needed. Spelling is fairly regular, but stress marks and vowel accents are often omitted from text, so for some words the dictionary/exceptions list will need to determine the stress position or whether to use open/close [e] or [E] and [o] or [O].

kn Kannada
  Not much feedback yet, but I'm told that it sounds reasonable.

ku Kurdish
  Not much work yet, but Kurdish has good spelling rules so it should be OK.

lv Latvian
  This has had assistance from a native speaker and it should be OK.

nl Dutch
  Needs improvement of the spelling-to-phoneme rules.

pl Polish
  Usable.

pt Portuguese (Brazil)
  Brazilian Portuguese. This has had assistance from a native speaker and it should be OK. Like Italian there is further work to do about the ambiguity in the spelling between open/close "e" and "o" vowels.

pt-pt Portuguese (European)

ro Romanian
  Probably OK. More work is needed to improve the position of stress within words.

sk Slovak
  This has had assistance from a native speaker, so it should be OK.

sr Serbian
  Usable. Wrong stressed syllables may be a problem. It accepts both Latin and Cyrillic characters. This voice is similar to hr Croatian and bs Bosnian

sv Swedish
  This has now had some work done on the pronunciation rules, so it should be useable.

sw Swahihi
  Not much feedback yet, but the spelling and stress rules are fairly regular, so it's probably usable.

ta Tamil
  This has had assistance from a native speaker, so it should be OK.

tr Turkish
  Not much work yet, but I'm told it sounds reasonable.

zh Mandarin Chinese
  This speaks Pinyin text and Chinese characters. There is only a simple one-to-one translation of Chinese characters to a single Pinyin pronunciation. There is no attempt yet at recognising different pronunciations of Chinese characters in context, or of recognising sequences of characters as "words". The eSpeak installation includes a basic set of Chinese characters. More are available in an additional data file for Mandarin Chinese at: http://espeak.sourceforge.net/data/.

### 3.5 Provisional Languages

These languages are only initial naive implementations which have had little or no feedback and improvement from native speakers.

cy Welsh
  An initial guess, awaiting feedback.

grc Ancient Greek
  Includes a short pause between words to help understanding.

hi Hindi
  This is interesting because it uses the Devanagari characters. I'm not sure about Hindi stress rules, and I expect the sound of aspirated/unaspirated consonant pairs needs improvement.

hy Armenian
  Needs feedback from native speakers. The hy-west voice has different pronunciation of some consonants for Western Armenian pronunciation.

id Indonesian
  An initial guess, no feedback yet.

is Icelandic
  An initial guess, awaiting feedback.

jbo Lojban
  An artificial language.

ka Georgian
  An initial guess, awaiting feedback.

la Latin
  Stress rules are implemented, but it needs text where long vowels are marked with macrons.

mk Macedonian
  This is similar to hr Croatian, so it's probably usable. It accepts both Latin and Cyrillic characters.

no Norwegian
  An initial guess, awaiting feedback.

ru Russian
  So far it's just an initial attempt with basic pronunciation rules. Work is needed especially on the consonants. Russian has two versions of most consonants, "hard" and "soft" (palatalised) and in most cases eSpeak doesn't yet make a proper distinction.
  Russian stress position is unpredictable so a large lookup dictionary is needed of those words where eSpeak doesn't guess correctly. To avoid increasing the size of the basic eSpeak package, this is available separately at: http://espeak.sourceforge.net/data/

sq Albanian
  Some initial feedback, but needs more work.

vi Vietnamese
  This is interesting because it's a tone language. I don't know how it should sound, so it's just a guess and I need feedback.

zh-yue Cantonese Chinese
  Just a naive simple one-to-one translation from single Simplified Chinese characters to phonetic equivalents in Cantonese. There is limited attempt at disambiguation, grouping characters into words, or adjusting tones according to their surrounding syllables. This voice needs Chinese character to phonetic translation data, which is available as a separate download for Cantonese at: http://espeak.sourceforge.net/data/.
  The voice can also read Jyutping romanised text.

### 3.6 Mbrola Voices

Some additional voices, whose name start with mb- (for example mb-en1) use eSpeak as a front-end to Mbrola diphone voices. eSpeak does the spelling-to-phoneme translation and intonation. See mbrola.html.