In English TXT text, it is common to see mixed case usage for the same word, such as Black and black appearing simultaneously. This article uses batch replacement of English words as a starting point to introduce how to use HeSoft Doc Batch Tool to search for keywords across multiple text files and replace them uniformly. The article focuses on file import, exact search, case-insensitive matching, keyword list correspondence, and post-processing verification methods, making it a useful reference for office users who need to maintain TXT content in bulk.
When dealing with English materials, course content, scientific research texts, website content drafts, or system-exported TXT files, it is often necessary to uniformly replace an English word with another. A seemingly simple find-and-replace task becomes repetitive labor once it involves multiple files. What's more troublesome is that English words may have case differences: "Black" at the beginning of a sentence, "black" in the middle, and possibly other forms in titles. Opening files one by one for manual replacement is not only inefficient but also prone to omissions.
This article explains, through a clear example, how to batch replace English words in text files. The example requirement is: find "black" in multiple TXT files and replace it with "red". The operation uses HeSoft Doc Batch Tool , a file batch processing software for office scenarios, suitable for batch processing texts, documents, and other common office files, helping users reduce repetitive operations.
Applicable Scenario: Typical Requirements for Batch Word Correction in English TXT Files
Batch replacing English words is not limited to "black" and "red" in the example. As long as you need to uniformly modify fixed content across multiple text files, you can refer to this workflow.
Revision of English Learning Materials and Teaching Texts
When teachers or trainers organize English materials, they may need to standardize certain vocabulary, replace example words, or modify expressions. If the materials are scattered across multiple txt files, batch replacement can significantly save time.
Maintenance of Scientific Research, Technical Notes, and Knowledge Base Texts
Scientific research or technical documents often contain a large number of terms. After terminology updates, if old words appear in many texts, using batch find-and-replace can maintain material consistency.
Cleaning of Website Content, Script Notes, and Exported Text
Operations and technical staff may maintain many plain text drafts, configuration notes, or export records. When keywords, tags, or category names within them need adjustment, batch replacement is more suitable than manual processing.
Unified Replacement for Mixed-Case Text
One of the biggest characteristics of English text is that case is influenced by grammatical position. In the example, the first instance is "Black," while later instances are "black." By setting the ignore case option, you can avoid missing replacements due to case differences.
Effect Preview: How "black" in the Black Hole Text Becomes "red" After Processing
Before processing, there are multiple text files in the folder. A screenshot of the file list shows that the files to be processed include big_bang.txt, black_holes.txt, dark_energy.txt, dark_matter.txt, galaxies.txt. This indicates the task is not a single file replacement, but batch processing multiple TXT files.

After opening black_holes.txt, "black" appears in multiple places within the text. The green highlighting in the screenshot shows the found words, and the red arrows emphasize some positions. Note that the first line begins with "Black," with the first letter capitalized; other sentences mostly use the lowercase "black." If only a case-sensitive replacement method is used, it might not cover all forms at once.

After batch processing is complete, checking the same file again shows that the positions where "black" or "Black" originally appeared have now become "red." The green highlighting shows the post-replacement result, indicating the keyword replacement has taken effect. Other text files in the imported list will be processed according to the same rules.

Operation Steps: Setting Up Batch Replacement of English Words in TXT Files within the Office Software
The following is a step-by-step explanation based on actual interface screenshots. For ease of understanding, this article explains the purpose and expected result of each step together.
Step 1: Select the Find-and-Replace Function in the Text Tools
After launching HeSoft Doc Batch Tool , first select "Text Tools" in the left navigation. The software provides multiple office file processing categories on the left, allowing users to enter the corresponding tool based on file type. Since the current processing target is txt text files, you should enter Text Tools, not Word Tools, Excel Tools, or PDF Tools.
In the function cards for Text Tools, click "Find and Replace Keywords in Text." The description below the card indicates this function is used for batch finding and replacing keywords in text file content, consistent with the goal of batch replacing English words.

After completing this step, the software enters the task page for this function. Its significance lies in selecting the correct batch processing capability: we are replacing file content, not file names or folder names.
Step 2: Add the TXT Files to be Processed to the Task List
After entering the function page, you can see the process is divided into four steps: Select records to process, Set processing options, Set save location, and Start processing. The first step requires importing files. Buttons like "Add File," "Import Files from Folder," "Clear," and "More" are located at the top right of the interface.
If the files to be processed are already centralized in a folder, it's recommended to use "Import Files from Folder"; if only processing a few scattered files, you can use "Add File." In the example, 5 txt files have been added to the list, and the table displays each file's name, path, extension, creation time, and modification time.

The expected result of this step is that all text files needing English word replacement are added to the table. After importing, don't rush to the next step; it's advisable to check the file count and paths first. The bottom of the example shows the record count is 5, indicating the current task will process 5 text files.
Step 3: Choose Exact Search and Set Ignore Case
After clicking "Next," you enter "Set Processing Options." This is the most critical part of the entire batch replacement task. The "Find Method" in the interface provides "Find Exact Text" and "Use Formula for Fuzzy Text Search." The goal of this example is clear: find "black," so select "Find Exact Text."
In the additional options, check "Ignore letter case." This step is a very important setting when dealing with English words. Because the original text contains both "Black" and "black," after ignoring case, the software will identify them all as the same search target. In the processed file, the original "Black" and "black" will both be replaced with "red."
You can also see the option "Match complete words instead of parts of words." This option controls whether to match only standalone words. In the example screenshot, this item is not checked. In actual use, you should judge based on your own text. If you are concerned that the search term might appear inside longer words and cause incorrect replacements, pay close attention to this setting.

Step 4: Fill in the Keyword Lists Before and After Replacement
Enter "black" in the "Keyword list to find" and "red" in the "Replacement keyword list." The two lists represent the replacement relationship: the left side is the word to find, the right side is the word to replace it with. The example has only one set of relationships, so entering one line is sufficient.
If your office task requires replacing Chinese words, English phrases, numbers, code snippets, or fixed symbols, you can fill them in the same way. Note that the search term should be as accurate as possible, and the replacement term should be confirmed in advance to avoid rework after batch processing.
Step 5: Set the Save Location and Start Processing
After completing the keyword settings, continue by clicking "Next." The progress bar shows the subsequent steps as "Set save location" and "Start processing." The save location determines where the processed files are saved, while "Start processing" executes the batch replacement based on the previous file list and rules.
For important texts, it's recommended to keep the original files first and save the processed results to an easily identifiable location. This way, even if the replacement rules need adjustment, you can start over from the original files. After the task is complete, spot-check a few files to confirm that "red" has appeared in the original positions of "black."
Common Questions and Notes
1. How to Handle Case When Replacing English Words
If you want forms like "Black," "BLACK," and "black" all to be replaced, check "Ignore letter case." If you only want to replace the exact match "black," do not check it. In the example, to uniformly replace all case forms, the "Ignore letter case" option was selected.
2. Why Are Replacement Results All "red" Instead of Retaining the Original Case
From the post-processing screenshot, you can see the original "Black" also became "red." This indicates the replaced content is based on the "red" entered in the right-side "Replacement keyword list." If you want the replacement result to use a different case form, you should enter the corresponding content in the replacement word field.
3. How to Reduce the Risk of Incorrect Replacement Before Batch Processing
It's recommended to spot-check the file content first to confirm the context of the search term; secondly, choose whether to match complete words as needed; finally, try to keep the original files or set a separate output location. Batch processing is efficient, but the more accurate the pre-set rules, the more reliable the results.
4. Is This Method Suitable for Word Documents
This article demonstrates with TXT text files. Word documents include formats like doc and docx, which have different file structures from plain text. If you need to batch replace content in Word documents, you should enter the Word Tools in the software or find the appropriate operation entry in the corresponding document processing function.
Summary: Focus on Case and Match Scope for Batch Replacement of English Text
The key to batch replacing English words in text files is not just entering the find and replace words, but also paying attention to case and match scope. Through HeSoft Doc Batch Tool , you can add multiple TXT files to the same task, set exact find and ignore case in the "Find and Replace Keywords in Text" function, and batch replace "black" with "red."
If you are maintaining a large number of English txt files, you no longer need to open and manually replace them one by one. Following the workflow in this article—first importing files, setting the find and replace rules, then setting the save location and starting processing—allows you to complete multi-file content updates faster. For office tasks with high repetitiveness and large numbers of files, batch processing tools can significantly reduce manual operation time and make the text modification process more stable and checkable.