How to convert the Dual Language RMVB to 1 Language AVI

hahakl

Hi,5.39.217.77) d0 T* G; G! n" m3 \6 O/ D0 G

! q+ z5 r6 [" f' r6 nAnyone know what software can I use to convert the 2 language RMVB to 1 language AVI?
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Thank you very much