所有主-1: 私の専門分野は、言語学です。

Excite!&@nifty:
My specialized field is linguistics.

Livedoor:
My special field of study is linguistics.

Yahoo!:
My specialized field is linguistics.

OCN:
My specialized field is linguistics.

BabelFish:
My special field is linguistics.

Google:
My field is linguistics.

Bing Translator:
My specialty is the linguistics.

Summary)
Comparing to translations of "私の専門分野," Bing produces a different output.