PRO_getLang();
returns current language id of IEPro.
bel: Belarusian
bgr: Bulgarian
chs: Chinese (PRC)
cht: Chinese (Taiwan)
csy: Czech
dan: Danish
deu: German
eng: English
esp: Spanish
fra: French
hun: Hungarian
ita: Italian
jpn: Japanese
kor: Korean
lth: Lithuanian
nld: Dutch
non: Norwegian
plk: Polish
ptb: Portuguese (Brazil)
ptg: Portuguese (Portugal)
rus: Russian
sky: Slovak
slv: Slovenian
sqi: Albanian
srl: Serbian
sve: Swedish
tha: Thai
trk: Turkish