It is not possible directly to put subtitles in two different languages but there is a very simple method to do it.
1) Export your video including subtitles in language (A);
2) Get the.SRT file from this video by following These steps ;
3) Import this video including the subtitles in language (A) into the tool;
4) Import your.SRT file by clicking here:
5) Select the desired language (B) for the subtitles and set the style (color, vertical position, etc.);
6) Export your video which will now include subtitles in 2 languages.
And that's it