This topic is somewhat old but it takes only a week or so to finally put the translation live with localizer, yay!
Now I had made two buttons in a ul that I wanted to highlight when the chosen language is 'on'. Jquery add- and remove Class-thing. Now this, it works in codepen, in jsfiddle, but not on the page with the blocks!
I tried the whole (yester)day and evening. It is not a css-conflict, the jquery library is okee, so in heaven's name what can it be.
Later I thought, there might be a php solution to that, so that the active language 'echo''s the active class. I suppose something in localizer.pgp needs to be done. Is this a realistic idea?
I am going to try something.