For all the multilingual countries, the RETURN_ALT_LANG_FIELDS
constraint was used to convert fields to the alternate language. To support the
alternate language feature for Japan, a new custom constraint called
DESIRED_ALT_LANGUAGE has been implemented. This constraint accepts
a two-letter language code as a parameter. User now has a capability to provide language
code for Latin (EN), Katakana (KA) or Kanji (JA) for which they want the response.
Output language needs be one that the country supports (EN, KA, JA). This feature is
implemented only for Japan and all other multilingual countries would not be impacted by
this functionality. For more details see Geo Addressing Data Release Notes.