Actually they will know the effect by searching through internet (website) coz got english translation for every cards. Many people bought japanese card version because it release faster and more card than english version. English version quite slow and some japanese version not even release in english version. 

Ya..I still playing Yu-Gi-Oh cards. I'm a diehard fan...But other ppl not so sure...Haha.    Whether got big Tournament/League or not I'm not sure. But every Saturday and Sunday u can go 2 Sg Wang (6th floor) or Times Square (5th floor) bcoz got small tournament held there. U can meet ppl dueling there

I seldom go there play coz is quite far for me.    Most of them playing in Japanese card and some ppl playing Japanese version mix with English version. Actually u can play both version whether is in English or Japanese version.  Is up 2 u.

Yes, you can mix it as long as your cards is Asia version (English/Japanese). Ya u r right, sometimes ppl play the card effect I haven't c it b4. So, normally they will explain 2 u how the effect work if u dunno. If u not sure about the effect u can also ask ppl there (judges/other ppl there). 

hoho....the m'sia tour is coming soon....this week sunday. who is going?