対象-1: 言語学者は、言葉の研究をしています。

Excite!&@nifty:
The linguist is researching the word.

Livedoor:
The linguist is studying language.

Yahoo!:
The linguist studies words.

OCN:
A linguist is studying a word.

BabelFish:
The language scholar has researched word.

Google:
Linguists, and language studies.

Bing Translator:
Linguist to the study of language.

Summary)
It seems Livedoor's output is the best though present simple is better.