レジ
「レジ」 means the checkout register or checkout counter here. It is the place where the system displays the item information and where the correction will be made. A common reuse point is 「レジで確認する」 for checking something at the checkout.
で
In 「レジでは」, 「で」 marks the place where the displaying happens: at the register. It connects a location with an action or state. The same particle is used in patterns such as 「店で確認する」 for checking something at a shop.
は
In 「レジでは」, 「は」 makes the register the topic and gives the statement a slight contrast with the shelf information. It highlights what is true at the register. A common reuse pattern is 「Aでは、B」 when describing what happens in one particular place or situation.
これ
「これ」 means this item, referring to the product being discussed at the checkout. It is used for something close to or clearly indicated by the speaker. A common reuse is 「これは何ですか」 when asking what an indicated item is.
が
In 「これが」, 「が」 marks 「これ」 as the subject of the display statement. It identifies which item is being shown as a different product. A common reuse pattern is 「これが正しいです」 when identifying the correct item.
別
In 「別の商品」, 「別」 means different or separate, so the item is being treated as a different product. It describes the difference between the item at the register and the product the customer expected. A common reuse is 「別の方法」 for a different method.
の
In 「別の商品」, 「の」 links 「別」 to 「商品」 and makes the first part describe the second: a different product. It is a linking particle between describing words and nouns. A common reuse pattern is 「AのB」 when A specifies or describes B.
商品
「商品」 means a product or item for sale. Here it refers to the item recorded by the checkout system. A common reuse is 「この商品」 when pointing out a particular product.
として
In 「別の商品として」, the whole expression means as a different product. 「と」 marks the category or status being assigned, and 「して」 connects that status to the display statement. This construction is useful when saying that something is treated, regarded, or presented in a particular way.
表示
「表示」 means the display or label information shown by the register or on the shelf. In 「表示されています」, it refers to how the item appears in the system. A common reuse is 「価格を表示する」 for displaying a price.
されて
In 「表示されて」, 「されて」 shows that the item is being displayed, with the display happening to it rather than it performing the action. It connects 「表示」 to 「います」 to describe the current displayed state. A common reuse is 「画面に表示されている」 for something being displayed on a screen.
います
In 「表示されています」, 「います」 helps express the current state of something being displayed and makes the statement polite. Together with 「表示されて」, it means that the register currently shows the item in that way. A common reuse is 「表示されています」 when politely describing information currently shown.
でも
「でも」 means but and introduces information that conflicts with the register display. Here it contrasts the register's information with the shelf label. A common reuse is placing 「でも」 at the start of a sentence when adding an opposing point.
棚
「棚」 means shelf. Here it refers to the shop shelf where the product and its label were located. A common reuse is 「棚に置く」 for putting something on a shelf.
この
In 「この商品」 and 「このサイズ」, 「この」 means this particular and directly identifies the noun that follows. It points to an item or size relevant to the current situation. A common reuse pattern is 「この+noun」 when selecting or indicating something.
下
In 「この商品の下」, 「下」 means below or underneath the product. It describes the shelf label's position relative to the product. A common reuse is 「机の下」 for underneath a desk.
に
In 「下にありました」, 「に」 marks the location where the label was located. It connects the place 「下」 with the existence statement. A common reuse pattern is 「場所にある」 for saying that something is located in a place.
ありました
「ありました」 says that something was located there or was present, referring here to the shelf label below the product. Its polite form fits the customer's explanation of where the label had been. A common reuse is 「そこにありました」 for saying that something was there.
何か
In 「何かを変更する」, 「何か」 means something or any particular thing that may be changed. It keeps the possible change unspecified. A common reuse is 「何かありますか」 when asking whether there is something.
を
In 「何かを変更する」, 「を」 marks 「何か」 as the object being changed. It shows what the action affects. A common reuse pattern is 「nounを確認する」 for checking something.
変更
「変更」 means a change or alteration. Here it refers to changing information at the register before the shelf label is checked. A common reuse is 「予定を変更する」 for changing a plan.
する
In 「変更する」, 「する」 means to carry out or make the change expressed by 「変更」. Together, 「変更する」 means to change something. A common reuse is combining 「する」 with an action noun such as 「確認する」.
前
In 「変更する前に」, 「前」 means before and places the checking earlier than the change. The clause before 「に」 identifies the action that must happen first. A common reuse is 「出かける前に確認する」 for checking before going out.
確認
「確認」 means checking or confirming information. Here the staff member will check the shelf label before changing the register. A common reuse is 「内容を確認する」 for checking the contents.
します
In 「確認します」, 「します」 is the polite form used to say that the speaker will check or will do something. It gives the staff member's response a polite tone. A common reuse is 「確認します」 when promising to check a detail.
サイズ
「サイズ」 means size. Here it identifies the particular size below which the label was located. A common reuse is 「サイズを選ぶ」 for choosing a size.
すぐ
In 「すぐ下」, 「すぐ」 means directly or immediately next to the stated position, so the label was directly below the size. It emphasizes a close position here rather than a delay. A common reuse is 「すぐ近く」 for very nearby.
システム
「システム」 means the system, here the shop's electronic item database or register system. It is the source against which the shelf label is being compared. A common reuse is 「システムに登録する」 for registering something in a system.
と
In 「システムと一致していません」, 「と」 marks the system item as the thing being compared with the label. It links the two sides of the match or mismatch. A common reuse is 「情報と一致する」 for matching information.
一致
「一致」 means a match or agreement. In 「一致していません」, it describes whether the label and the item in the system correspond to each other. A common reuse is 「条件が一致する」 for conditions matching.
して
In 「一致していません」, 「して」 connects 「一致」 to the following negative form and makes it part of the ongoing matching expression. The whole expression says that the label does not match the system item. A common reuse is 「合っていません」 when politely stating that something is not correct or does not fit.
いません
In 「一致していません」, 「いません」 makes the matching statement negative: the label is not matching the item in the system. Together with 「一致して」, it describes the current mismatch politely. A common reuse is 「まだ終わっていません」 for saying that something is not finished yet.
私
「私」 means I or me. In 「私が支払う前に」, it identifies the customer as the person who will pay. A common reuse is 「私は客です」 when introducing oneself as the topic.
支払う
「支払う」 means to pay, referring here to paying for the product. In 「私が支払う前に」, the payment has not yet happened when the correction is requested. A common reuse is 「料金を支払う」 for paying a fee.
修正
「修正」 means a correction or the act of correcting something. Here it refers to correcting the item information at the register. A common reuse is 「内容を修正する」 for correcting content.
いただけますか
In 「修正していただけますか」, the whole expression politely asks whether the listener could correct it. 「いただけ」 presents receiving the listener's favor, 「ます」 adds polite language, and 「か」 turns the request into a question. This is useful when making a courteous request to staff or another person.
承認
「承認」 means approval. Here the correction needs approval from a supervisor before it can be made. A common reuse is 「申請を承認する」 for approving an application.
もらう
In 「承認してもらう」, 「もらう」 means to have someone do an action for the speaker or to receive that action as a favor. The expression means to get the correction approved by the supervisor. A common reuse is 「確認してもらう」 for having someone check something.
ため
In 「承認してもらうために」, 「ため」 expresses the purpose of getting approval. The following action is done in order to obtain the supervisor's approval. A common reuse is 「確認するために」 for the purpose of checking.
責任者
「責任者」 means the person in charge or supervisor. Here it is the staff member who can approve the correction. A common reuse is 「責任者に確認する」 for checking something with the person in charge.
必要
「必要」 means necessary or needed. In 「責任者が必要です」, it says that a supervisor is needed to approve the correction. A common reuse is 「確認が必要です」 for saying that a check is necessary.
です
In 「必要です」, 「です」 politely states that the supervisor is necessary. It gives the sentence a polite, matter-of-fact ending. A common reuse is 「大丈夫です」 for a polite statement that something is okay.
いる
In 「確認している間」, 「いる」 helps show that the checking action is in progress. Together with 「確認して」, it means while you are checking. A common reuse is using this form after an action when describing something currently being done.
間
In 「確認している間」, 「間」 means while or during the time that the checking continues. It sets the time during which the customer can wait. A common reuse is 「仕事をしている間」 for while working.
待てます
「待てます」 means can wait. Here the customer is saying that waiting during the staff member's check is possible. A common reuse is 「ここで待てます」 when saying that one can wait in a particular place.
も
In 「棚の表示も」, 「も」 means also or too. It shows that the shelf label will be updated in addition to fixing the register information. A common reuse is adding 「も」 after a noun when including another item or action.
更新
「更新」 means an update or the act of updating. Here it refers to changing the shelf label so that it reflects the corrected product information. A common reuse is 「情報を更新する」 for updating information.
後
In 「後で」, 「後」 means later or afterward. It refers to a time after the current checkout situation. A common reuse is 「後で連絡する」 for contacting someone later.
戻って
In 「戻ってくる」, 「戻って」 means returning and connects the return action to 「くる」. Here it describes coming back to the shop at a later time. A common reuse is 「家に戻って」 when saying that someone returns home before another action.
くる
In 「戻ってくる」, 「くる」 contributes the meaning of coming back toward the current place or situation. The whole expression means to return or come back. A common reuse is 「また来る」 for coming again.
より
In 「後で戻ってくるより」, 「より」 introduces the option being compared and means rather than. The speaker prefers resolving the matter now instead of returning later. A common reuse pattern is 「AよりB」 when choosing or comparing B with A.
今
「今」 means now. Here it contrasts resolving the issue immediately with returning later. A common reuse is 「今確認する」 for checking something now.
解決
「解決」 means resolution or settling a problem. In 「解決したい」, it refers to settling the shelf-label and register mismatch. A common reuse is 「問題を解決する」 for solving a problem.
したい
In 「解決したい」, 「したい」 expresses the speaker's desire to carry out the action of resolving the issue. The sentence says that the speaker wants to settle it now. This form is useful after an action to say that the speaker wants to do that action.