There is often a small portion of grammar, punctuation, and spelling that even the most proficient native speakers may not acquire.

Bishop Léonard himself is a proficient speaker of Dutch.

Private schools using a British or American system teach English and produce proficient speakers, but Arabic is the dominant language of communication.

While Harvath was a proficient Arabic speaker, his reading ability had never been as strong as he would have liked.

A proficient Chinese speaker, she is the only First Lady to have spoken an Asian language.

Often, even highly proficient speakers will import the vowel-retraction rules from their native dialects.

Students who at the final exams are classified as fully proficient english speakers will attend Language Arts in the new year.

Nonetheless, the number of proficient speakers of Occitan is dropping precipitously.

He accepted and came up with a solution, although he was not a proficient speaker of Bulgarian at first.

While he spoke mainly Japanese at home, Fujimori also learned to become a proficient Spanish speaker during his years at school.