Redmine

Is redmine0.8.7 export correctly PDF file in Chinese and Japanese language?
and if I want to export in Thai language too , so I need to create file like 2 files are chinese.rb and japanese.rb that right?
and what is the meaning of these characters like

Big5_widths={' '=>250,'!'=>250,'"'=>408,'#'=>668,''=>490,'%'=>875,'&'=>698,'\''=>250,
'('=>240,')'=>240,'*'=>417,'+'=>667,','=>250,'-'=>313,'.'=>250,'/'=>520,'0'=>500,'1'=>500,
'2'=>500,'3'=>500,'4'=>500,'5'=>500,'6'=>500,'7'=>500,'8'=>500,'9'=>500,':'=>250,''=>250,
'<'=>667,'='=>667,'>'=>667,'?'=>396,'@'=>921,'A'=>677,'B'=>615,'C'=>719,'D'=>760,'E'=>625,
'F'=>552,'G'=>771,'H'=>802,'I'=>354,'J'=>354,'K'=>781,'L'=>604,'M'=>927,'N'=>750,'O'=>823,
'P'=>563,'Q'=>823,'R'=>729,'S'=>542,'T'=>698,'U'=>771,'V'=>729,'W'=>948,'X'=>771,'Y'=>677,
'Z'=>635,'['=>344,'\\'=>520,']'=>344,'^'=>469,'_'=>500,'`'=>250,'a'=>469,'b'=>521,'c'=>427,
'd'=>521,'e'=>438,'f'=>271,'g'=>469,'h'=>531,'i'=>250,'j'=>250,'k'=>458,'l'=>240,'m'=>802,
'n'=>531,'o'=>500,'p'=>521,'q'=>521,'r'=>365,'s'=>333,'t'=>292,'u'=>521,'v'=>458,'w'=>677,
'x'=>479,'y'=>458,'z'=>427,'{'=>480,'|'=>496,'end'=>480,'~'=>667}