tayousoninsyou wo setteisi, ninsyoukoodo wo kakuninsuru.

A natural reading is:

たようそにんしょう を せっていし、にんしょうコード を かくにんする。

Word by word:

• 多要素認証 = たようそにんしょう
• を = を (pronounced o)
• 設定し = せっていし
• 認証コード = にんしょうコード
• 確認する = かくにんする

多要素認証 is made up of:

• 多 = many
• 要素 = elements / factors
• 認証 = authentication

So literally it means multi-factor authentication or authentication using multiple factors.

In natural English, this is usually called multi-factor authentication (MFA) or sometimes two-factor authentication (2FA), depending on context.

Because there are two separate actions, and each action has its own direct object.

• 多要素認証を設定し
  • 多要素認証 is the thing being set up
• 認証コードを確認する
  • 認証コード is the thing being checked/confirmed

So the structure is:

• [object] を 設定し
• [object] を 確認する

This is completely normal in Japanese.

Here, し is the continuative/stem form of する.

• 設定する = to set up / configure
• 設定し、 = set up ..., and ...

It links this action to the next one.

So:

• 設定し、確認する means
• set up ..., and check ...

This kind of linking is common in written instructions, manuals, menus, and UI text.

Both are possible, but they feel a little different.

• 設定して、確認する sounds a bit more conversational and explicit
• 設定し、確認する sounds more concise, written, and instructional

In interfaces, headings, manuals, and step labels, Japanese often prefers the shorter written style, so 設定し、確認する fits well.

The final verb is in dictionary form because this is a common style for:

• instructions
• menu items
• headings
• procedure labels
• general action descriptions

It is not necessarily a full sentence in the conversational sense. It often works like an instruction label, similar to English UI language such as:

• Set up multi-factor authentication and check the authentication code
• Configure MFA and verify the code

Japanese often uses plain dictionary form in this kind of context.

They are originally nouns, but they can become verbs with する.

• 設定 = setting / configuration

• 設定する = to set up / configure

• 確認 = confirmation / checking
• 確認する = to confirm / check

This is a very common pattern in Japanese, especially with Sino-Japanese words.

So in this sentence:

• 設定し comes from 設定する
• 確認する is also a noun + する verb

No subject is stated explicitly, but one is understood from context.

In Japanese, especially in instructions, the subject is often omitted. Here, the implied subject is usually:

• you
• or a general user performing the steps

So the sentence effectively means something like:

• (You) set up multi-factor authentication and check the authentication code.

This omission is very natural in Japanese.

It functions like an instruction, but grammatically it is not a direct imperative form.

It is softer and more neutral than a true command like:

• 設定しろ
• 確認しろ

Instead, it uses the plain explanatory/instructional style common in written directions.

A more polite version might be:

• 多要素認証を設定し、認証コードを確認してください。

So the given sentence is best understood as instructional UI language, not a harsh command.

• 認証 = authentication
• 認証コード = authentication code / verification code

So:

• 多要素認証 = multi-factor authentication
• 認証コード = the code used as part of that authentication process

Even though both contain 認証, they refer to different things:

• one is the overall process/system
• the other is a specific code used in that process

The comma 、 helps separate the two linked actions:

• set up multi-factor authentication
• check the authentication code

Japanese commas are often used more flexibly than English commas. In instructional writing, they help readability and make the sequence of actions clear.

The sentence could sometimes appear without the comma, but using it here is very natural.

Yes. It naturally suggests that the actions happen in sequence:

1. set up multi-factor authentication
2. check the authentication code

Because 設定し links to the next action, it usually implies do A, then do B.

So this is not just a random list of actions; it reads as a step-by-step instruction.

Yes. The linking form 設定し、 can often be translated in several ways depending on context:

• and
• then
• after setting up ...
• set up ..., and check ...

All of these can work. The exact English wording depends on how natural you want it to sound.

In a UI or instruction context, then is often a very natural choice because the sentence suggests sequence.