Random website strings refuse to be translated

Hi, i tried to complete the website translation to spanish but i found many strings just refuse to be translated. The download->software page has many strings left in english and this is annoying to someone who does not understand them. The forum and some other pages also have few strings that i cant translate but i think the main thing is the page to download the software, arguably the most important page on the site. This is done by desing for some reason or is this a bug?

Edit: i forgot to mention the actual problem, i translate them like any other string, when i reload the page they just go back to the untranslated string. I translated other strings just fine.