@russian-dima His problem is how to set is as part of the SEO. Those types of characters are rejected for page titles and descriptions. Which means they will not get indexed properly.
Wix does have a way of setting a page title but not a page description. IF the characters are not rejected when set via code, then this will only solve his Title problem.
Wonder if Wix Dev Team can confirm if characters can be bypassed via code for indexing? Or if they will allow us to set page description via code as well.