According to Oracle's documentation, if you enter and post additional journal entries in your ledger currency after you run translation, you should rerun translation for the entire ledger or ledger set to ensure that all balances are translated using the same exchange rates. Then, you should reconsolidate your results to reflect the updated translated balances. References:
* Using General Ledger, page 9-7: "If you enter and post additional journal entries in your ledger currency after you run translation, you should rerun translation for the entire ledger or ledger set."
* Using General Ledger, page 9-8: "After you run translation, you can consolidate your results to create a consolidated balance sheet and income statement."
* Implement General Ledger, page 2-10: "You can translate and consolidate balances as part of the period close process."