I haven't seen any option for subtitles. It's a very simple program and it took like a bit more than 1 MB when I installed it so I'm guessing you won't have any trouble.

It offers (streaming) what is airing on tv and radio right in that moment, so not sure the subtitles are an option right now.

You can choose English and main language and all the buttons, options would be in English, so no problem there ;)