> How wouldn't there be a cost? How wouldn't there be a cost of switching between two languages? Normally. You could try, you'd know then. Though the prerequis

> How wouldn't there be a cost? How wouldn't there be a cost of switching between two languages? Normally. You could try, you'd know then. Though the prerequisite is a system that is designed, with clearly designated borders between the parts, not a system that has just emerged. Proving something's non-existence is a little like proving that you're not a weapons smuggler. How would you expect to even start? > There are more things you have to remember. Workflows in both languages. Of course it's more stuff, thus more context. But this is irrelevant to switching between the languages. You have just as much to remember if you write unrelated things, each in its own language. > Is it just as easy to maintain Spanish and English skills than just English? "Just as easy than"? Really? In a thread about languages? You picked wrong analogy. It is just as easy to write prose with every second paragraph in English and Spanish as it would be with just English. The prerequisite, obviously, is that you know both languages. > And you have to use both languages constantly to stay fresh in them. For some value of "constantly". It's not like people forget everything about a language when they don't use it for a week or a month. > "I don't notice it" isn't a very strong argument. Well, at least it's some argument. On your side is only "how wouldn't there be a cost?", clearly from a position of somebody who doesn't use many languages.