"proficient in" or "proficient at"?

Proficient in spoken Chinese is required.

Being proficient in the language does not.

He was proficient in the Kisimbeti language.

It is rare to find an individual who is equally proficient in both languages (16).

A person is not truly bilingual unless he is equally proficient in both languages.

It's just a matter of putting in the time and becoming proficient in these sports.

Proficient in English or French: You must be able to speak, write, comprehend and read either French or English.

Assistants can do this by refining a skill they're already proficient in or attempting to capture something new.

All applicants must be highly proficient in the use of Adobe Photoshop CS5/6 and Capture One or Adobe Lightroom.

This time round neither of the characters (except for Zer0) is more - or less - proficient in a specific weapon.

Janet: I couldn't get proficient at it.

I became really quite proficient at this.

I'd rather proficient at sushi as it happens.

If you wish to be the greatest, you should know exactly what you're proficient at.

The two security men responded immediately and were very proficient at their work.

They are clearly more proficient at maintaining focus than I'd be in their position.

Applying stress dressings round the affected regions continues to be proficient at preventing wart configuration.

One president found time to earn a commercial pilot's license and to become quite proficient at Mandarin Chinese.

As a Calgary psychologist and a Cochrane psychologist, I can help you to learn and become proficient at this skill.

I hope she is taking notes on the comments from people's experiences to help her become more proficient at her job.

I could be proficient with this seven-letter-word.

Work on using it and getting very proficient with it.

Only a pinch of tinder is required when you are proficient with striking a spark.

We are also very proficient with scripting, mapping, spiriting and modifications.

Let me add, Silver is not very proficient with mathematical modeling on a computer.

In addition, she is proficient with UNSC military hardware and can run military ships and stations by herself.

However, being proficient with the controls doesn? t come close to meaning that you are proficient in the game.

He became so skillful and proficient with them that it would be hard to find his equal in this respect nowadays.

Many of whom are also honor students who love to read and are proficient with surfing the internet, but oh well.

Palmer wants someone proficient on their instrument.

You would do better to become proficient on a moderate wing.

As noted above, become proficient on one, and it will another.

MR: You both are pretty proficient on your instruments, having watched you before.

I think to make yourself a more rounded rider, you should be proficient on either.

Hell, I would expect to be very proficient on any decent platform within 3 months.

Unfortunately for him, riders like Dovi are proficient on all types of circuit, so he needs to overcome that deficit.

Through grade school and high school, Mike excelled as an artist and grew even more proficient on the basketball court.

Students must perform at a specific level to score proficient on standardized tests and to progress to the next grade level.

Proficient on violin, mandolin, guitar, piano, bass, clarinet, and accordion, today Mullins is part of the Nashville Star house band.