”You speak Japanese very well!!" ，まずはほぼ直訳。
でも ”Your Japanese is absolutely great!" と言えば、訳は「あなたの日本語はすごい上手ですね！！」という感じでもまた言えますね。 そう、言語についても「あなたの」とか「わたしの」という所有格で表現するのが英語ならではの言い方かもしれません。従ってこれは英語でもまた同じですね。
がんばってください！！
sound like ～で、～みたい（に聞こえる）という意味です。
例文は「あなたは日本人みたいに聞こえる」、つまり、ネイティブ（日本人）かと思うほど日本語が流暢ですね、となります。
Your Japanese is great. とか、Why is your Japanese so good?（どうしてあなたの日本語はそんなに上手いの？）という言い方も、もちろんできます。
相手の日本語力にもよりますが、発音が流暢な人にはYou sound like Japanese.を使って見てください。
The first phrase expresses more about your own reactions to the persons Japanese skills, rather than their skill, but this is a very common way of expressing the concept in the US.
"Excellent" is my favorite word for expressing the concept of "very good." It's easy to use, but a little less common, which gives it more impact! :D
Have a great day!! :D
I have to admit, I'm pretty impressed by your ability to speak Japanese!
Your Japanese skills are great!
This is a simple, cheerful, and informal way of telling a foreigner that they are doing well with speaking Japanese.
Wow! You sound just like a native!
This expression is very flattering and very kind. It is nice to say, even if they do not sound exactly like a native Japanese speaker. It still implies that they speak very good Japanese.
I have to admit, I'm pretty impressed by your ability to speak Japanese!
This is a more formal way to express to a foreigner that they speak Japanese well. You might say this in a business situation.
Your Japanese skills are great!
シンプルな言い回しですね。
カジュアルな言い回しで、日本語の会話力が優れていることを言います。
Wow! You sound just like a native!
これはちょっと褒めすぎかもしれませんが、仮に完全にネイティブに聞こえなくても、褒め言葉として上手に日本語を喋っていますね、と相手に伝えることができます。
I have to admit, I'm pretty impressed by your ability to speak Japanese!
これは日本語を上手に操るビジネスマンなどに対して表現するフォーマルな表現になります。
If someone knows a lot of Japanese you can say - You are very fluent in Japanese.
If someone has a good accent and pronounces the Japanese words or sentences correctly you can say - your accent is very good.
If they know a lot of vocabulary and have good pronunciation - you can say many things including;
You know a lot of Japanese.
Your Japanese is very good.
I am impressed with your Japanese.
Hope this helps
Jane :)
日本語が喋れるのなら、You are fluent in Japanese.
もし発音が良いなら、Your accent is very goodといえますね。
もし、語彙力がすごくて発音もきれいなら色んな言い方があります。
例
You know a lot of Japanese.
Your Japanese is very good.
I am impressed with your Japanese.
お役に立てれば幸いです。
Jane :)
Your Japanese is quite good for someone whose first language is not Japanese.
Your Japanese is really great.
1)Your Japanese is quite good for someone whose first language is not Japanese.- This is a polite way to inform them that considering it is not their first language they are doing great.
"1) Your Japanese is quite good for someone whose first language is not Japanese.
これ、は母国語ではないのにとてもうまいですよ、と相手に伝える丁寧な表現です。"
Your Japanese is very good. - In this sentence we use the adjective 'good' to describe the person's Japanese. You can replace good with a number of other adjectives.
Your Japanese is great!
Your Japanese is amazing!
You speak Japanese very well. - In this sentence rather than using an adjective to describe the person's Japanese, we use the verb 'to speak' and modify it with the adverb 'well'. 'Well' can be replaced with other adverbs.
You speak Japanese proficiently.
You speak Japanese excellently.
Your Japanese is very good.
-この文では、「good」という形容詞を使っています。
他の形容詞を使うこともできます。
（例文）
Your Japanese is great!
Your Japanese is amazing!
You speak Japanese very well.
-形容詞を使わずに動詞の「speak」と副詞の「well」を代わりに使うことができます。
他の副詞を代わりに使うこともできます。
（例文）
You speak Japanese proficiently.
日本語を上手に話せます。
You speak Japanese excellently.
日本語を上手に話せます。
Your Japanese sounds natural. = あなたの日本語って自然だね。
Where did you learn that word! = その言葉どこで学んだの？
Your pronunciation is perfect! = あなたの発音って完璧！
pronunciation = 発音 （カタカナで書くと、"プロナウンシエーション"のように聞こえます）
Where did you learn～ = ～をどこで学んだの？
なぜその人の英語がうまいのか、具体的に褒めてあげると、相手もうれしいのではないでしょうか？
You speak like a native...You are so fluent in Japanese
"Native speakers",speak in the language of their home country. T
hey were born into that sociery...and it " comes naturally to them"
When we speak "like a native" we are so good / fluent that we cannot easily be
distinguished from those who come from that country (where that language
is their "native tongue")
"Native speakers"は母国の言葉を話す人です。その人達はその社会で生まれていますので、母国語は当然自然に話します。
"like a native"という時は、言葉を使うのが上手い/流暢なので、（その言葉が母国語の国）出身の人との区別が容易に出来ないということです。
日本 
アメリカ合衆国 
イギリス 
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