I kinda solve it myself, but not happy.
If like me you have a one page website website with many anchors you cannot have your website name and then the hashtag, instead you can only use the hashtag.
Example this what I had before: http://www.ana-isabel.com/#about
To fix it, now I only have: #about
This would all be very well, if it was not for the fact that when I on another page (for example Terms and Conditions) the menu simply does not work. Yes I can have a menu just for those pages, but guess what TranslatePress simply does not link to the sections I need, even though they work perfectly fine in the default language.
Not happy, so I would kindly ask the TranslatePress team to fix this problem. The last thing I need is to re-design my website.
Thank you.
Why is TranslatePress taking so long to reply to this post? I need my menu to work ASAP!