svg:LanguageCodesType 

a comma-separated list of language codes, as per [RFC3066]

http://www.ietf.org/rfc/rfc3066.txt

Simple Type Information

Used By

Attribute svg:testAttrs/@systemLanguage

Source 

<simpleType name="LanguageCodesType">
  <annotation>
    <documentation>a comma-separated list of language codes, as per [RFC3066]</documentation>
    <documentation source="http://www.ietf.org/rfc/rfc3066.txt"/>
  </annotation>
  <restriction base="string"/>
</simpleType>