母語 ぼご話者 わしゃ
bogowasha

Noun

1. native speaker

かれ英語 えうご はなすのを けば、母語 ぼご話者 わしゃだと おもうだろう。
karega ēgō hanasu nō kikeba bogowashadato omōdarō.
To hear him speak English, you would take him for a native speaker.