I contacted the developer and he fixed the language issue about a day later.
After that I requested a "more" portable version, hopefully he will consider that too.
My attempt at a more portable version has been tested and runs OK on Win7 64bit.
As the "Battery Mode" application only uses the registry entry "HKEY_CURRENT_USER\Software\Battery Mode" to store the program's user settings, I have made it "more" portable by using the launcher PAL.exe. This launcher exchanges any existing regentry with the portable entry on run-start. On run-exit the two entries are swapped back over.
A "more" portable version from the author would be preferred, but this work around seems to work well enough.
If you want to try it this out then the simple PAL launcher is available from: https://bittit.info/publicDro/PAL.zip
I have used the following text in PAL.ini, you need to point to your own program path in the "Executable=" line.