[lyx.git] / lib / languages

##########################################################################
#
# Languages supported by LyX.
#
# Syntax:
#
# Language <lyxname>
#       GuiName            "<Gui Name>"
#       BabelName          <babelname>
#       PolyglossiaName    <polyglossianame>
#       PolyglossiaOpts    "<language-specific options>"
#       Encoding           <encoding>
#       QuoteStyle         <danish|english|french|german|polish|swedish>
#       InternalEncoding   <true|false>
#       RTL                <true|false>
#       AsBabelOptions     <true|false>
#       LangCode           <language_code>
#       LangVariety        <language_variety>
#       PreBabelPreamble
#         <extra latex code inserted before babel>
#       EndPreBabelPreamble
#       PostBabelPreamble
#         <extra latex code inserted after babel>
#       EndPostBabelPreamble
#       Requires           <requirement>
# End
#
#
# NOTES:
#
# * Omitted elements will be treated as empty (if string) or "false"
#   (if boolean).
# * The QuoteStyle arguments correspond to the following styles:
#   - danish:  >>text<<  >text<   (inward guillemets)
#   - english: ``text''  `text'   (66_99)
#   - french:  <<text>>  <text>   (outward guillemets)
#   - german:  ,,text``  ,text`   (99/66)
#   - polish:  ,,text''  ,text'   (99/99)
#   - swedish: ''text''  'text'   (99_99)
#   Note that the option names have been selected (rather arbitrarily)
#   because the respective styles are common in the respective countries.
#   Of course this does not imply any fixed relation to those countries.
# * Encoding is not relevant for XeTeX (which is utf8 always), and if
#   Document > Settings > Language > Encoding is not set to "Language
#   Default"
# * InternalEncoding is used to tell LyX that babel internally sets a font
#   encoding (such as hebrew to LHE). See bug #5091.
# * AsBabelOptions advices LyX to pass the languages locally to babel, not
#   globally to the class. Some languages (basically those not directly
#   supported by babel) need this.
#   FIXME: in this case, we might still need to pass the other languages
#          globally, for the use of other packages (such as varioref).
# * LangCode is also used for spellchecking and thesaurus, where the
#   dictionaries are named accordingly. Thus, check this when intoducing/
#   changing language codes (especially aspell, thesaurus).
#   TODO: maybe use Best Current Practice (BCP 47) codes for LangCode
#         http://www.rfc-editor.org/rfc/bcp/bcp47.txt
#         http://www.w3.org/International/articles/language-tags/
#         http://www.iana.org/assignments/language-subtag-registry
# * LangVariety is used by the aspell spellchecker to differentiate
#   dictionaries for different varieties of a given language (e.g. German
#   pre-1998 and post-1998 spelling). The aspell dictionaries are named
#   language[_REGION][-variety].multi, e.g. de-alt.multi for "German (old
#   spelling)" (see http://aspell.net/man-html/Dictionary-Naming.html)
#
##########################################################################

#
# LyX-internal languages
#

Language ignore
        GuiName          "Ignore"
        BabelName        ignore
        PolyglossiaName  ignore
        Encoding         iso8859-1
        LangCode         ignore
End

Language latex
        GuiName          "LaTeX"
        Encoding         iso8859-1
        LangCode         latex
End

#
# Real languages
#

# not yet supported by polyglossia
Language afrikaans
        GuiName          "Afrikaans"
        BabelName        afrikaans
        QuoteStyle       polish
        Encoding         iso8859-15
        LangCode         af_ZA
End

Language albanian
        GuiName          "Albanian"
        BabelName        albanian
        PolyglossiaName  albanian
        QuoteStyle       french
        Encoding         iso8859-2
        LangCode         sq_AL
End

Language american
        GuiName          "English (USA)"
        BabelName        american
        PolyglossiaName  english
        PolyglossiaOpts  "variant=american"
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         en_US
End

# not supported by babel
Language ancientgreek
        GuiName          "Greek (ancient)"
        PolyglossiaName  greek
        PolyglossiaOpts  variant=ancient
        QuoteStyle       french
        Encoding         iso8859-7
        LangCode         grc_GR
End

# FIXME: dummy babel language for arabic_arabtex to be able
# to switch the language the way of the ArabTeX-package
Language arabic_arabtex
        GuiName          "Arabic (ArabTeX)"
        BabelName        arabtex
        QuoteStyle       french
        Encoding         cp1256
        RTL              true
        LangCode         ar_SA
End

# polyglossia uses "Arabic" for the lang environment
Language arabic_arabi
        GuiName          "Arabic (Arabi)"
        BabelName        arabic
        PolyglossiaName  arabic
        QuoteStyle       french
        Encoding         cp1256
        RTL              true
        AsBabelOptions   true
        LangCode         ar_SA
End

# not supported by babel
Language armenian
        GuiName          "Armenian"
        PolyglossiaName  armenian
        QuoteStyle       french
        Encoding         utf8
        LangCode         hy_AM
End

Language australian
        GuiName          "English (Australia)"
        BabelName        australian
        PolyglossiaName  english
        PolyglossiaOpts  "variant=australian"
        Encoding         iso8859-15
        QuoteStyle       english
        LangCode         en_AU
End

Language austrian
        GuiName          "German (Austria, old spelling)"
        BabelName        austrian
        PolyglossiaName  german
        PolyglossiaOpts  "variant=austrian,spelling=old,babelshorthands=true"
        QuoteStyle       german
        Encoding         iso8859-15
        LangCode         de_AT
End

Language naustrian
        GuiName          "German (Austria)"
        BabelName        naustrian
        PolyglossiaName  german
        PolyglossiaOpts  "variant=austrian,babelshorthands=true"
        QuoteStyle       german
        Encoding         iso8859-15
        LangCode         de_AT
End

Language bahasa
        GuiName          "Indonesian"
        BabelName        bahasa
        PolyglossiaName  bahasai
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         id_ID
End

Language bahasam
        GuiName          "Malay"
        BabelName        bahasam
        PolyglossiaName  bahasam
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         ms_MY
End

Language basque
        GuiName          "Basque"
        BabelName        basque
        PolyglossiaName  basque
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         eu_ES
        PostBabelPreamble
        \addto\extrasbasque{\bbl@deactivate{~}}
        EndPostBabelPreamble
End

# not yet supported by polyglossia
Language belarusian
        GuiName          "Belarusian"
        BabelName        belarusian
        QuoteStyle       french
        Encoding         cp1251
        LangCode         be_BY
        AsBabelOptions   true
End

Language brazilian
        GuiName          "Portuguese (Brazil)"
        BabelName        brazil
        PolyglossiaName  brazil
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         pt_BR
End

Language breton
        GuiName          "Breton"
        BabelName        breton
        PolyglossiaName  breton
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         br_FR
End

Language british
        GuiName          "English (UK)"
        BabelName        british
        PolyglossiaName  english
        PolyglossiaOpts  "variant=british"
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         en_GB
End

Language bulgarian
        GuiName          "Bulgarian"
        BabelName        bulgarian
        PolyglossiaName  bulgarian
        QuoteStyle       german
        Encoding         cp1251
        LangCode         bg_BG
End

# not yet supported by polyglossia
Language canadian
        GuiName          "English (Canada)"
        BabelName        canadian
#       PolyglossiaName  english
#       PolyglossiaOpts  "variant=canadian"
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         en_CA
End

# not yet supported by polyglossia
Language canadien
        GuiName          "French (Canada)"
        BabelName        canadien
#       PolyglossiaName  french
#       PolyglossiaOpts  "variant=canadien"
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         fr_CA
End

Language catalan
        GuiName          "Catalan"
        BabelName        catalan
        PolyglossiaName  catalan
        PolyglossiaOpts  "babelshorthands=true"
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         ca_ES
End

# uses CJK package
Language chinese-simplified
        GuiName          "Chinese (simplified)"
        Encoding         euc-cn
        QuoteStyle       english
        LangCode         zh_CN
        Requires         CJK
End

# uses CJK package
Language chinese-traditional
        GuiName         "Chinese (traditional)"
        QuoteStyle       english
        Encoding        utf8-cjk
        LangCode        zh_TW
        Requires         CJK
End

# not supported by babel
Language coptic
        GuiName          "Coptic"
        PolyglossiaName  coptic
        Encoding         utf8
        LangCode         cop_EG
End

Language croatian
        GuiName          "Croatian"
        BabelName        croatian
        PolyglossiaName  croatian
        QuoteStyle       polish
        Encoding         iso8859-2
        LangCode         hr_HR
End

Language czech
        GuiName          "Czech"
        BabelName        czech
        PolyglossiaName  czech
        QuoteStyle       german
        Encoding         iso8859-2
        LangCode         cs_CZ
End

Language danish
        GuiName          "Danish"
        BabelName        danish
        PolyglossiaName  danish
        QuoteStyle       danish
        Encoding         iso8859-15
        LangCode         da_DK
End

# not supported by babel
Language divehi
        GuiName          "Divehi (Maldivian)"
        PolyglossiaName  divehi
        Encoding         utf8
        LangCode         dv_MV
End

Language dutch
        GuiName          "Dutch"
        BabelName        dutch
        PolyglossiaName  dutch
        PolyglossiaOpts  "babelshorthands=true"
        QuoteStyle       polish
        Encoding         iso8859-15
        LangCode         nl_NL
End

Language english
        GuiName          "English"
        BabelName        english
        PolyglossiaName  english
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         en_US
End

# Esperanto has no country code because it is an auxiliary language.
# We therefore the name of its hunspell dictionary.
Language esperanto
        GuiName          "Esperanto"
        BabelName        esperanto
        PolyglossiaName  esperanto
        QuoteStyle       english
        Encoding         iso8859-3
        LangCode         eo_EO
End

Language estonian
        GuiName          "Estonian"
        BabelName        estonian
        PolyglossiaName  estonian
        QuoteStyle       polish
        Encoding         iso8859-15
        LangCode         et_EE
        PostBabelPreamble
        \addto\extrasestonian{\bbl@deactivate{~}}
        EndPostBabelPreamble
End

# the preamble definitions are only used due to bugs in the
# arabi-package -- remove them if they become unnecessary!
Language farsi
        GuiName          "Farsi"
        BabelName        farsi
        PolyglossiaName  farsi
        Encoding         utf8
        RTL              true
        LangCode         fa_IR
        PostBabelPreamble
        \DeclareTextSymbol{\guillemotright}{LFE}{62}
        \DeclareTextSymbol{\guillemotleft}{LFE}{60}
        EndPostBabelPreamble
End

Language finnish
        GuiName          "Finnish"
        BabelName        finnish
        PolyglossiaName  finnish
        QuoteStyle       swedish
        Encoding         iso8859-15
        LangCode         fi_FI
End

# We redefine \og and \fg (guillemets) for older french language definitions
Language french
        GuiName          "French"
        BabelName        french
        PolyglossiaName  french
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         fr_FR
        PostBabelPreamble
        \addto\extrasfrench{%
           \providecommand{\og}{\leavevmode\flqq~}%
           \providecommand{\fg}{\ifdim\lastskip>\z@\unskip\fi~\frqq}%
        }
        EndPostBabelPreamble
End

Language galician
        GuiName          "Galician"
        BabelName        galician
        PolyglossiaName  galician
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         gl_ES
        PostBabelPreamble
        \addto\shorthandsgalician{\galiciandeactivate{~}}
        EndPostBabelPreamble
End

# german does not use a country code (due to the variety)
Language german
        GuiName          "German (old spelling)"
        BabelName        german
        PolyglossiaName  german
        PolyglossiaOpts  "spelling=old,babelshorthands=true"
        QuoteStyle       german
        Encoding         iso8859-15
        LangCode         de
        LangVariety      alt
End

Language ngerman
        GuiName          "German"
        BabelName        ngerman
        PolyglossiaName  german
        PolyglossiaOpts  "babelshorthands=true"
        QuoteStyle       german
        Encoding         iso8859-15
        LangCode         de_DE
End

# Swiss German is not supported by babel and polyglossia yet
# We use ngerman for now (spellchecking is supported though!)
Language german-ch
        GuiName          "German (Switzerland)"
        BabelName        ngerman
        PolyglossiaName  german
        PolyglossiaOpts  "babelshorthands=true"
        QuoteStyle       danish
        Encoding         iso8859-15
        LangCode         de_CH
End

Language greek
        GuiName           "Greek"
        BabelName         greek
        PolyglossiaName   greek
        QuoteStyle        french
        Encoding          iso8859-7
        InternalEncoding  true
        LangCode          el_GR
End

Language polutonikogreek
        GuiName           "Greek (polytonic)"
        BabelName         polutonikogreek
        PolyglossiaName   greek
        PolyglossiaOpts   "variant=polytonic"
        QuoteStyle        french
        Encoding          iso8859-7
        InternalEncoding  true
        LangCode          el_GR
End

Language hebrew
        GuiName           "Hebrew"
        BabelName         hebrew
        PolyglossiaName   hebrew
        Encoding          cp1255
        QuoteStyle        english
        InternalEncoding  true
        RTL               true
        LangCode          he_IL
End

# not supported by babel
Language hindi
        GuiName          "Hindi"
        PolyglossiaName  hindi
        Encoding         utf8
        LangCode         hi_IN
End

# Currently not supported (file format change!)
# "hungarian" is a synonym for the "magyar" babel language option
# "hungarian" might be used for special purposes,
# see http://www.math.bme.hu/latex/magyar_pre_tug2004.pdf
#Language hungarian
#       GuiName         "Hungarian"
#       BabelName       hungarian
#       Encoding        iso8859-2
#       LangCode        hu_HU
#End

Language icelandic
        GuiName          "Icelandic"
        BabelName        icelandic
        PolyglossiaName  icelandic
        QuoteStyle       german
        Encoding         iso8859-15
        LangCode         is_IS
End

# Interlingua has no official country code because it is an auxiliary
# language. We therefore the name of its hunspell dictionary.
Language interlingua
        GuiName          "Interlingua"
        BabelName        interlingua
        PolyglossiaName  interlingua
        Encoding         iso8859-15
        LangCode         ia_IA
End

Language irish
        GuiName          "Irish"
        BabelName        irish
        PolyglossiaName  irish
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         ga_IE
End

Language italian
        GuiName          "Italian"
        BabelName        italian
        PolyglossiaName  italian
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         it_IT
End

# japanese must be loaded locally with babel options,
# not globally via class options
# http://www.lyx.org/trac/ticket/4597#c4
# Since japanese does not load fontenc, we set
# InternalEncoding to true.
Language japanese
        GuiName          "Japanese"
        BabelName        japanese
        Encoding         jis-platex
        LangCode         ja_JP
        AsBabelOptions   true
        Requires         japanese
        InternalEncoding true
End

# uses CJK package
Language japanese-cjk
        GuiName         "Japanese (CJK)"
        Encoding        euc-jp
        LangCode        ja_JP
        Requires        CJK
End

# not yet supported by polyglossia
# not supported by babel
Language kazakh
        GuiName         "Kazakh"
        Encoding        ascii
        LangCode        kk_KZ
        PostBabelPreamble
        \input{t2aenc.def}
        \AtBeginDocument{\fontencoding{T2A}\selectfont}
        EndPostBabelPreamble
End

Language korean
        GuiName         "Korean"
        Encoding        euc-kr
        QuoteStyle      english
        LangCode        ko_KR
        Requires        CJK
End

# not yet supported by polyglossia
Language kurmanji
        GuiName          "Kurmanji"
        BabelName        kurmanji
        Encoding         utf8
        LangCode         kmr
        AsBabelOptions   true
End

# not supported by babel
Language lao
        GuiName          "Lao"
        PolyglossiaName  lao
        Encoding         utf8
        LangCode         lo_LA
End

# There is no country code for Latin because it is a dead language.
# We therefore the name of its hunspell dictionary.
Language latin
        GuiName          "Latin"
        BabelName        latin
        PolyglossiaName  latin
        Encoding         iso8859-15
        LangCode         la_LA
End

# latvian must be loaded locally with babel options,
# not globally via class options
Language latvian
        GuiName          "Latvian"
        BabelName        latvian
        PolyglossiaName  latvian
        QuoteStyle       danish
        Encoding         iso8859-4
        LangCode         lv_LV
        AsBabelOptions   true
End

# lithuanian must be loaded locally with babel options,
# not globally via class options
Language lithuanian
        GuiName          "Lithuanian"
        BabelName        lithuanian
        PolyglossiaName  lithuanian
        QuoteStyle       german
        Encoding         iso8859-13
        LangCode         lt_LT
        AsBabelOptions   true
End

Language lowersorbian
        GuiName          "Lower Sorbian"
        BabelName        lowersorbian
        PolyglossiaName  lsorbian
        QuoteStyle       german
        Encoding         iso8859-2
        LangCode         dsb_DE
End

Language magyar
        GuiName          "Hungarian"
        BabelName        magyar
        PolyglossiaName  magyar
        QuoteStyle       polish
        Encoding         iso8859-2
        LangCode         hu_HU
End

# not supported by babel
Language marathi
        GuiName          "Marathi"
        PolyglossiaName  marathi
        Encoding         utf8
        LangCode         mr_IN
End

# mongolian must be loaded locally with babel options,
# not globally via class options
# not yet supported by polyglossia
Language mongolian
        GuiName          "Mongolian"
        BabelName        mongolian
        Encoding         utf8
        LangCode         mn_MN
        AsBabelOptions   true
End

Language newzealand
        GuiName          "English (New Zealand)"
        BabelName        newzealand
        PolyglossiaName  english
        PolyglossiaOpts  "variant=newzealand"
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         en_NZ
End

Language norsk
        GuiName          "Norwegian (Bokmaal)"
        BabelName        norsk
        PolyglossiaName  norsk
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         nb_NO
End

Language nynorsk
        GuiName          "Norwegian (Nynorsk)"
        BabelName        nynorsk
        PolyglossiaName  nynorsk
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         nn_NO
End

# not supported by babel
Language occitan
        GuiName          "Occitan"
        PolyglossiaName  occitan
        QuoteStyle       french
        Encoding         utf8
        LangCode         oc_FR
End

# Currently not supported (file format change!)
# Russian orthography from the Petrine orthographic reforms of
# 1708 to the 1917 orthographic reform
# Language oldrussian
#       GuiName          "Russian (Petrine orthography)"
#       PolyglossiaName  russian
#       PolyglossiaOpts  spelling=old
#       LangCode         ru_petr1708
# End

Language polish
        GuiName          "Polish"
        BabelName        polish
        PolyglossiaName  polish
        QuoteStyle       polish
        Encoding         iso8859-2
        LangCode         pl_PL
End

Language portuguese
        GuiName          "Portuguese"
        BabelName        portuges
        PolyglossiaName  portuges
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         pt_PT
End

Language romanian
        GuiName          "Romanian"
        BabelName        romanian
        PolyglossiaName  romanian
        QuoteStyle       polish
        Encoding         iso8859-2
        LangCode         ro_RO
End

Language russian
        GuiName          "Russian"
        BabelName        russian
        PolyglossiaName  russian
        QuoteStyle       french
        Encoding         koi8-r
        LangCode         ru_RU
End

Language samin
        GuiName          "North Sami"
        BabelName        samin
        PolyglossiaName  samin
        Encoding         iso8859-15
        LangCode         se_NO
End

# not supported by babel
Language sanskrit
        GuiName          "Sanskrit"
        PolyglossiaName  sanskrit
        Encoding         utf8
        LangCode         sa_IN
End

Language scottish
        GuiName          "Scottish"
        BabelName        scottish
        PolyglossiaName  scottish
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         gd_GB
End

Language serbian
        GuiName          "Serbian"
        BabelName        serbianc
        PolyglossiaName  serbian
        QuoteStyle       german
        Encoding         iso8859-5
        LangCode         sr_RS
        AsBabelOptions   true
End

Language serbian-latin
        GuiName          "Serbian (Latin)"
        BabelName        serbian
        PolyglossiaName  serbian
        PolyglossiaOpts  "script=latin"
        QuoteStyle       german
        Encoding         iso8859-2
        LangCode         sr_RS-Latin
End

Language slovak
        GuiName          "Slovak"
        BabelName        slovak
        PolyglossiaName  slovak
        QuoteStyle       german
        Encoding         iso8859-2
        LangCode         sk_SK
End

Language slovene
        GuiName          "Slovene"
        BabelName        slovene
        PolyglossiaName  slovenian
        QuoteStyle       german
        Encoding         iso8859-2
        LangCode         sl_SI
End

Language spanish
        GuiName          "Spanish"
        BabelName        spanish
        PolyglossiaName  spanish
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         es_ES
        PostBabelPreamble
        \addto\shorthandsspanish{\spanishdeactivate{~<>}}
        EndPostBabelPreamble
End

# there are no spanish shorthands in polyglossia
Language spanish-mexico
        GuiName          "Spanish (Mexico)"
        BabelName        spanish
        PolyglossiaName  spanish
        QuoteStyle       french
        Encoding         iso8859-15
        LangCode         es_MX
        PostBabelPreamble
        \addto\shorthandsspanish{\spanishdeactivate{~<>.}}
        EndPostBabelPreamble
End

Language swedish
        GuiName          "Swedish"
        BabelName        swedish
        PolyglossiaName  swedish
        QuoteStyle       swedish
        Encoding         iso8859-15
        LangCode         sv_SE
End

# not supported by babel
#Language syriac
#       GuiName          "Syriac"
#       PolyglossiaName  syriac
#       Encoding         utf8
#       RTL              true
#       LangCode         syr_SY
#End

# not supported by babel
Language tamil
        GuiName          "Tamil"
        PolyglossiaName  tamil
        Encoding         utf8
        LangCode         ta_IN
End

# not supported by babel
Language telugu
        GuiName          "Telugu"
        PolyglossiaName  telugu
        Encoding         utf8
        LangCode         te_IN
End

Language thai
        GuiName          "Thai"
        BabelName        thai
        PolyglossiaName  thai
        QuoteStyle       english
        Encoding         tis620-0
        LangCode         th_TH
        PostBabelPreamble
        \usepackage{thswitch}
        EndPostBabelPreamble
End

# not supported by babel
Language tibetan
        GuiName          "Tibetan"
        PolyglossiaName  tibetan
        Encoding         utf8
        LangCode         bo_CN
End

Language turkish
        GuiName          "Turkish"
        BabelName        turkish
        PolyglossiaName  turkish
        QuoteStyle       french
        Encoding         iso8859-9
        LangCode         tr_TR
        PostBabelPreamble
        \usepackage{xkeyval}
        EndPostBabelPreamble
End

# turkmen must be loaded locally with babel options,
# not globally via class options
Language turkmen
        GuiName          "Turkmen"
        BabelName        turkmen
        PolyglossiaName  turkmen
        QuoteStyle       french
        Encoding         utf8
        LangCode         tk_TM
        AsBabelOptions   true
End

Language ukrainian
        GuiName          "Ukrainian"
        BabelName        ukrainian
        PolyglossiaName  ukrainian
        QuoteStyle       french
        Encoding         koi8-u
        LangCode         uk_UA
End

Language uppersorbian
        GuiName          "Upper Sorbian"
        BabelName        uppersorbian
        PolyglossiaName  usorbian
        QuoteStyle       german
        Encoding         iso8859-2
        LangCode         hsb_DE
End

# not supported by babel
#Language urdu
#       GuiName          "Urdu"
#       PolyglossiaName  urdu
#       Encoding         utf8
#       RTL              true
#       LangCode         ur_PK
#End

# vietnam must be loaded locally with babel options,
# not globally via class options, see
# http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg129417.html
Language vietnamese
        GuiName          "Vietnamese"
        BabelName        vietnam
        PolyglossiaName  vietnamese
        QuoteStyle       french
        Encoding         utf8
        LangCode         vi_VN
        AsBabelOptions   true
        Requires         vietnamese
End

Language welsh
        GuiName          "Welsh"
        BabelName        welsh
        PolyglossiaName  welsh
        QuoteStyle       english
        Encoding         iso8859-15
        LangCode         cy_GB
End