User blog comment:GooerGaming/High School DxD BorN episode 8 review/@comment-67.62.189.6-20150527023125/@comment-1359322-20150527024529

That's just the anime just adding a twist to it, cause the actually pronunciation from it's katakana is バイリンガル which is Bilingual if it's like you said the actual wording would have been ぴえリンガル.