Website starts up in the wrong language

One-sentence description

To have a language preference in your profile so that the website starts up in your prefered language

Every time I start up the website or click on a link in the newsletter it starts up in English. I don't speak English so I would like it to start up in Dutch.

Have a cookie or something with a long time to live so that we shouldn't click on the flag every time we use the website

Cookies

Thank you in advance! Love you!