How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,tvb now,tvbnow,bttvb/ O% z5 W# |' _) S5 T& d2 i

* y+ e6 @& [! _2 u  n% eAnyone know what software can I use to convert the 2 language RMVB to 1 language AVI?
( t; i  [* j$ A( w3 N' Ctvb now,tvbnow,bttvb  b. o9 o3 [- E1 k, t8 o. U7 ^
Thank you very much