日本企業は色々な部署を経験するので専門性がつきにくいって英語でなんて言うの？

「日本企業は色々な部署を経験するので専門性がつきにくい」＝　In Japanese companies, you are sent to work in various different departments to gain experience so it is difficult to become specialised. / Japanese companies tend to send their employees to work in many different departments so it's not easy to become specialised.

ボキャブラリー
Japanese companies ＝　日本企業
various ＝　色々
department ＝　部署
gain experience ＝　経験を積む
difficult(not easy) to become specialised ＝　専門性がつきにくい