None of those symbols are supported in HTML. HTML is a completely different formatting language. I think you can start a paragraph with the characters: <p>
and end it with the characters </p>
(although there are other ways to insert newlines as well.) That's the direction you have to go. You can easily google the HTML language syntax and you will find many ways to start new lines. But the methods you were trying (like \n) are not part of the HTML language.
What is the source text that winds up in Local_sourceTerms? Is it a set of two words side by side? Multiple rows of multiple words? I'm having trouble understanding what the input looks like, which makes it trickier to figure out how to set the output.
Can you give an example of what you're copying as the source?
You wouldn't. But I think the issue here (and I'm on tenterhooks waiting!) is that @ALYB is trying to set the text in a form field. That's just "normal" text, not HTML, so \n is a valid/sensible character.