Serious question: is there actuall proposed legislative language about what "The Wall" is and/or what the 5.6 billion would go towards that the WH has drafted? Like, what does the bill text for that appropriation look like?

OK, so here's the legislative language from the House version. HR 695 SEC 141, ready for this?

"Notwithstanding any other provision of this Act, there is appropriated for ‘U.S. Customs and Border Protection—Procurement, Construction, and Improvements’ $5,710,357,000 for fiscal year 2019, to remain available until September 30, 2023."