Depends on what you want: - if you want to engineer the space station, better learn Russian. - if you want to engineer robots, better learn Japanese. - if you w

Depends on what you want: - if you want to engineer the space station, better learn Russian. - if you want to engineer robots, better learn Japanese. - if you want to engineer consumer electronics, better learn Chinese. - if you want to engineer cheap space missions, better learn Hindu. - if you want to engineer pharmaceutical products or perfumes, better learn French. - if you want to engineer oil refineries, then American English will do.