How to convert the Dual Language RMVB to 1 Language AVI

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Hi,0 F; h) @( I& i0 \. f8 _. Y
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Anyone know what software can I use to convert the 2 language RMVB to 1 language AVI?" K0 D) x0 E; V! C4 A# C: p' t) L

2 w2 C4 W# e- m: mThank you very much