有關西班牙文同德文,,,

Depends on what your career path will be - if you're in science, especially chemistry and pharmacology, then German is the most useful. A lot of the historical break through in the field of chemistry were done by German chemists and the papers recording their findings are always in German.
Besides, Germany is where most of the chemists jobs are, along with Scandinavia.
I didn't say Spanish isn't useful either, just depends on what you want to do with the languages. If you're in the media field, the Spanish and French are more 'popular' than German.
To help you decide: Spanish is much easier to learn than German; German helps with English grammar (to understand English grammar's origin) - need a good background in English to learn.

西班牙文比較容易，又多人用
德文文法好難
兩樣都好容易講

西班牙文
南美洲除左4個國家外,全部都係講西班牙文
加上西班牙文比德文易
西班牙文比較多人學, 而且學西班牙文平d

2008-06-14 14:38:04 補充：
南美洲除左巴西, 圭亞那, 法屬圭亞那同蘇利南, 全部都係講西班牙文

西班牙文, 因為除0左西班牙外, 中美洲同南美洲好多國家都係用西班牙文