I meant it in terms so that we all don't have to register to give out a review of the website. Looking at the style of the website, it is very clean and simple. I like the colours and the styling (Only reviewing the English version).
To be honest, it looks really nice all around.
A few of my suggestions is to make scrolling smoother in the chat for a better experience and for it to go well with the rest of the website.
Also, do make the buttons so you could see the press animation (or something), not using a hyperlink on top of it and maybe make the button onclick="location.href='chat.html'" or something around those lines so pressing would take you to the page without anything hinting it being a hyperlink (on Chrome for Android, it shows as blue).