Embedding Subtitles into Video (Malaysian Only)

To embed 3 Subtitles together with the voiceover (provided in Malay & Chinese) into 3 different videos with 3 languages?

Video is about 9 minutes long.

I will provide you with:
1) Original Video without subtitles (English)
2) 3 x Transcripts in English, Malay, & Chinese
3) 2 x Voice Overs in Malay & Chinese

Please estimated time to complete the 3 videos.
Subtitles should sync 80%-90% with the voices of each video.