“落賬”在會計和財務語境中通常翻譯為：

**1. Post (to an account)**
最常用、最專業的譯法，指將分錄過賬到總賬或分類賬。
- 例：這筆交易需要立即落賬。 → This transaction needs to be posted to the account immediately.

**2. Record (in the books/accounts)**
強調“記錄入賬”的動作。
- 例：月底前所有發票必須落賬。 → All invoices must be recorded in the books before month-end.

**3. Enter into the ledger**
特指錄入分類賬，更具體。

**根據具體語境可選擇：**
- **過賬** → Posting
- **記賬** → Bookkeeping / Recording
- **確認入賬** → Account validation / Confirm booking

需要更精確的翻譯時，建議提供完整句子。例如：
“貨款已落賬” → The payment has been posted to the account.