After completing the document, the first thing you need to do is review it for any spelling errors. This article provides a detailed guide on the most effective way to check Vietnamese spelling errors in Word.
By default, Word is set to the English language. Therefore, when you compose text, if spell check is enabled, Vietnamese words may be underlined in red because Word defaults to checking English spelling. It does not recognize Vietnamese, resulting in errors. To address this, you need to use an additional Vietnamese language spell check file to perform spell checks in Vietnamese on Word.
Step 1: Download the Vietnamese spell check file to your computer by accessing this link.
Step 2: Extract the downloaded file and copy it to the UProof folder:
Open Explorer and enter the path in the address bar: %USERPROFILE%\AppData\Roaming\Microsoft\UProof -> copy the Vietnamese spell check file you just downloaded into it:

Step 3: Launch Microsoft Word -> go to the File -> Options tab:

Step 4: Select the Proofing tab and make the following choices:
- In the section When correcting spelling and grammar in Word: Check the box next to Check spelling as you type. (uncheck other options)
- In the section When correcting spelling in Microsoft Office programs: Click on Custom Dictionaries to choose the Vietnamese file:

Step 5: A dialog box appears, click Add:

Step 6: Choose the Vietnamese spell check file you downloaded Vietnamese.dic -> Open:

Step 7: Uncheck the box in the Custom.DIC section, a confirmation dialog will appear, click Yes:

Step 8: Click OK to complete the selection for checking content errors in Vietnamese on Word:

- The result when you type content in a language other than Vietnamese or with incorrect syntax will show a red underline error. Correct Vietnamese words will not be underlined:

In addition to the above method, you can access an online website to check Vietnamese spelling errors: http://vspell.com/Spell
Above is the detailed guide on How to check Vietnamese spelling errors in Word. Hope it helps you review your text content quickly. Wish you success!