openCRX html help pages are located in the directory C:\temp\opencrx-core-CRX.war. The following steps will guide you through the process of creating the html pages for the new locale xx_YY:
Decide which locale you want to use as a template (starting point) for your new locale xx_YY. In this example we will use en_US as a template. Hence, make a copy the file helpSearch_en_US.html and name it helpSearch_xx_YY.html
Open the file helpSearch_xx_YY.html with an html editor (a simple text editor will also work if you are familiar with html).
Once you are done with translating the whole page you save the file helpSearch_xx_YY.html with all the changes.
Repeat the above steps for the rest of the openCRX html help pages located in the directory C:\temp\opencrx-core-CRX.war.
If you don't feel like translating the help pages (or not all of them) you must still create the html pages for the new locale xx_YY as described above because there is no fallback mechanism for html pages - missing pages will cause an error 404 (page not found) if a user requests such a page.