It is difficult to tell which is more important.
Spanish is spoken, besides Spain, in South America (except Brasil) and many of the people living in the US also speak Spanish.
French is a more beautiful language. Besides in French, people in Luxembourg and southern Belgium also speak French.
There are some French speaking 'ex-colonies' in Africa and in the Pacific. Also in the most popular country for HK people - Canada, people in Quebec also speak French. I have heard that when you immigrate to Canada, you have to learn French.
I think it depends which one you think is useful for you in future.