feat: add ja and zh-hant support

[kitayoshi]

Description

refer to http://www.rfc-editor.org/rfc/bcp/bcp47.txt

• add ja and zh-Hant language support
• change README file name

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[codecov-io]

Codecov Report

Merging #39 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #39   +/-   ##
=======================================
  Coverage   53.32%   53.32%           
=======================================
  Files         123      123           
  Lines        1652     1652           
=======================================
  Hits          881      881           
  Misses        771      771

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