Modifying the existing strings for WebHelp Responsive output

To modify the generated text for WebHelp transformations, you need to create a DITA-OT extension plugin that uses the dita.xsl.messages extension point. The following procedure is for changing English labels, but you can adapt it for any language:

Create a com.oxygenxml.webhelp.localization plugin directory inside the [DITA-OT DIR]/plugins/ location.

Create a plugin.xml file inside that com.oxygenxml.webhelp.localization directory with the following content:

<plugin id="com.oxygenxml.webhelp.localization">
    <require plugin="com.oxygenxml.webhelp.classic"/>
    <require plugin="com.oxygenxml.webhelp.responsive"/>
						
    <feature extension="dita.xsl.strings" file="webhelp-extension-strings.xml"/>
</plugin>

Create a webhelp-extension-strings.xml file with the following content:

<langlist>
    <lang xml:lang="en"    filename="strings-en-us.xml"/>
    <lang xml:lang="en-us"    filename="strings-en-us.xml"/>
</langlist>

Copy the strings you want to change from the translation files to the strings-en-us.xml file. Make sure you leave the name attribute unchanged because this is the key used to look up the string. A sample content might be:
```
<strings xml:lang="en-US">
  <str name="Figure">Fig</str>
  <str name="Draft comment">ADDRESS THIS DRAFT COMMENT</str>
</strings>
```
Use the Run DITA-OT Integrator transformation scenario found in the DITA Map section in the Configure Transformation Scenario(s) dialog box.
In the [DITA-OT DIR]/bin directory of the DITA Open Toolkit, run one of the following scripts, depending on your operating system:
- Windows: [DITA-OT DIR]/bin/dita.bat --install
- Linux/Mac OS X: [DITA-OT DIR]/bin/dita.sh --install