YOU SAID:

Nearly 50% of spoken English is idiomatic

INTO JAPANESE

口語英語のほぼ50％が慣用であります

BACK INTO ENGLISH

Nearly 50 percent of spoken English will be the customary

INTO JAPANESE

口語英語のほぼ50％が通例となります

BACK INTO ENGLISH

Nearly 50 percent of spoken English will be the customary