Hi,
Thanks you for your patience Elise .. I did all your steps with screen shots as in the brackets below .. I made sure that all the steps have been done properly .. and the result is there is no currency menu appeared .. please check below ..

1. Create menu ( https://prnt.sc/jyrl5m ) > Assign language switcher to this menu.

2. Navigate to Woodmart > Header Builder > Add secondary menu element ( https://prnt.sc/jyrmkh ) > choose the created menu ( http://prntscr.com/jyrmzp ).

You do not need to add any shortcodes or PHP.

Currency switcher:

1. It has no option to be assigned to the menu, so, create a sidebar http://prntscr.com/jyd26j ( https://prnt.sc/jyro0e )

2. Assign the currency switcher to this sidebar WooCommerce > Multilingual > Multicurrency ( https://prnt.sc/jyrod3 )

3. Create HTML block http://prntscr.com/jyd2mb ( http://prntscr.com/jyrorc ) add a widgetized sidebar element http://prntscr.com/jyd3dx ( http://prntscr.com/jyrp06 ) and chose the created sidebar http://prntscr.com/jyd3i5 ( http://prntscr.com/jyrp06 )

4. Navigate to Woodmart > Header Builder > Add HTML block element ( http://prntscr.com/jyrpo6 ) and choose the created HTML ( http://prntscr.com/jyrpx2 ).

( http://prntscr.com/jyrqiq )

Best Regards