I really don't think changing the script while keeping the language is all that difficult. At least as long it has a somewhat similar glyph count. In my teens I

I really don't think changing the script while keeping the language is all that difficult. At least as long it has a somewhat similar glyph count. In my teens I learned about runes and was able to write my native language in runes within half an hour and fluently within 3, including reading of course. Also as a Computer Science major I have a somewhat okayish knowledge of the Greek letters and when visiting Greece I could with a bit of effort figure out the street signs without problem. Sure people will be less fluent in the one they don't use as often but I doubt it's a make hindrance