外国人の名前には漢字は使わない。
We don't use Kanji for foreign names.
外国の名前
foreign names.
漢字は使わない
We don't use
外国人の名前にはカタカナを使う。
We use Katakana for foreign names.
ご参考になれば幸いです。
For non Japanese names we don't usually use Kanji.
Kanji is not used for foreign names.
When writing names, it can be hard to directly translate a name from a western alphabet which originates from Latin into Kanji which is based on Chinese logographic characters and so is a totally different writing system. Both of these answers are suitable for telling someone that in Japan Kanji is not often used for foreigners names.
You can explain that if a name is not Japnese you don't write it in kanji, Japnese write those names in English. "We don't write foreign names in kanji. " Will do :)
日本語の名前でないと漢字では書かない、そういう名前は英語で書く、と説明できます。
"We don't write foreign names in kanji."
「外国の名前は漢字では書きません」
↑これで伝わります。
Only Japanese names can be written using Kanji and not foreign names.
We don't use Kanji to write foreign names, only Japanese names.
You can't write a foreign name using Kanji but you can use it to write a Japanese name.
The phrase 'only Japanese names' used in the first and second statements means 'exclusively Japanese', or, 'to the exclusion of all others'. This means that Kanji can be used to write exclusively Japanese names and not foreign names. In the third statement, the first part of the sentence states that 'you can't write a foreign name using Kanji'. This is the same as saying 'Kanji can't be used to write a foreign name'. The second part of the third sentence says, 'but you can use it to write a Japanese name, which is the same as, 'only a Japanese name can be written using Kanji'.
If you are explaining this to someone, you may say:
Only Japanese names can be written using Kanji and not foreign names.
or
We don't use Kanji to write foreign names, only Japanese names.
or
You can't write a foreign name using Kanji but you can use it to write a Japanese name.
一つ目と二つ目のフレーズで使われている 'only Japanese names' は「日本人の名前だけ」または「他のものは含まない」という意味です。「漢字は日本人の名前にしか使われない、外国人の名前には使われない」と伝えています。
三つ目の例は 'you can't write a foreign name using Kanji' と始めています。これは 'Kanji can't be used to write a foreign name'（外国人の名前には感じは使えない）と同じ意味です。
三つ目の例の後半では 'but you can use it to write a Japanese name' と伝えています。これは 'only a Japanese name can be written using Kanji'（日本人の名前しか漢字では書けない）と同じ意味です。
これを人に説明するなら、次のように言えます。
Only Japanese names can be written using Kanji and not foreign names.
（日本人の名前しか漢字では書けません、外国の名前は漢字では書けません）
We don't use Kanji to write foreign names, only Japanese names.
（漢字は外国人の名前を書くときには使いません、日本人の名前だけです）
You can't write a foreign name using Kanji but you can use it to write a Japanese name.
（外国人の名前は漢字では書けませんが、日本人の名前は書けます）
Please write your name using the English alphabet and language.
I am clearly stating that it is necessary to use the English alphabet when writing their name by saying 'Please write your name using the English alphabet' so that they do not write a sentence in English but their name in kanji. I add language at the end of the sentence to convey a second time that they must write in the English language.
名前を書くときには英語のアルファベットを使うよう明確に伝えています。
'Please write your name using the English alphabet'（名前は英語で書いてください）
文ではなく名前を英語で書くよう伝えています。最後に "language" を加えて、英語で書くよう念を押しています。
If you want to explain to your friend that kanji isn't used to write foreign names, you can use any of these sentences:-
1. Foreign names cannot be written in Kanji.
外字は漢字で書くことはできません。
2. We only write Japanese names in Kanji.
日本語の名前は漢字で書くだけです。
外国の名前は漢字では書かないと説明したいなら、次の文が使えます。
1. Foreign names cannot be written in Kanji.
外国の名前を漢字で書くことはできません。
2. We only write Japanese names in Kanji.
日本人の名前しか漢字では書きません。
Kanji, the style of writing, this is explaining that you don't use Kanji for foreign names, only Japanese names.
foreign names (western names) such as Jack, charlie, Amy etc.
For 'we don't use' this can be used for it is unacceptable or that it can't be used.
'Foreign' is the term for someone or something that is of another relation to your own.
There is no way, that I know of, that one can write foreign names in Kanji
When you want to explain that there is usually no way to write foreign names in Kanji; then you may explain this in the following ways:
-We don't usually use Kanji for foreign names
-There is no way, that I know of, that one can write foreign names in Kanji
「外国人の名前は漢字では書くことができない」と説明したいなら、次のように言えます。
-We don't usually use Kanji for foreign names（外国人の名前には普通漢字は使いません）
-There is no way, that I know of, that one can write foreign names in Kanji（私の知る限り、外国人の名前を漢字で書くことはできません）
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