I'm of course happy to follow any convention, but I'm confused about what the convention is. It looks like both # and ## are used in edx-platform:

https://github.com/edx/edx-platform/search?q=%23+Translators&type=Code
https://github.com/edx/edx-platform/search?q=%23%23+Translators&type=Code

It looks like # is common in .py and ## in .html. Is that correct?