…you see it written in ASCII and your mind automatically fills in the appropriate diacritics. (In some cases, even guessing them based on some kind of statistical process.)
I shall have to make some time to brush up on my Slovak before I head to SES again this summer, but probably not till after my Cornish exam in June as I don’t want to get mixed up.
Recently, Maltese has started to tickle the back of my brain again as well. We’ll see which language will be the next to take hold of me. Though currently I’m hoping to stick with Cornish till at least next year and take the level 3 exam then.