The term ken (kanji: 剣) means "sword [non-Japanese]" in English. It is written けん in hiragana..
This kanji can also be read as tsurugiTSURUGI 剣 "sword [non-Japanese]" learn more.... Both ken and tsurugi mean sword. Though ken is the Chinese reading of the kanji, you can use it on its own without any risk of confusion (within the proper context, of course).
Neither ken, used by itself, nor tsurugi refers to Japanese swords. However, ken is used in words like kenpō (剣法) and kenjutsuKENJUTSU 剣術 "the art of swords" learn more... (剣術), which both mean “the art of (Japanese) sword fighting.” In addition, there is the art of kendō (剣道), literally the “way” of the sword.