Here are the details. Provide me a clip of your video, as well as the English voice-overs. Give me a script indicating the timing of the English voice-overs with the foreign language audio. I'll do the rest by syncing the English and foreign language together and send you the audio file.
I can also do voice-overs and script editing, so if you want advice on a foreign language script and the English translation, I can help you there. Check out my two other gigs for specific details on writing, editing, and voice-over work too. One place, one stop.