iOS: Screen Keyboard with Full Hardware Layout

Among the many 3rd party screen keyboards available for iOS, I recently found one called PADKEYS that imitates the normal hardware keyboard layout, with a number/punctuation row at the top, an option key for symbols and accents,  cursor keys, etc.  Covers English, Danish, Dutch, Finnish, French, German, Italian, Norwegian, Portuguese, Spanish, and Swedish.

MacOS Keyboard Language Switching Bug

In MacOS 10.13.2, it appears that you cannot switch directly from Chinese/Japanese/Korean to Cyrillic/Arabic/Hebrew/Greek keyboard layouts.  In order to get the correct results, you must first switch to US or another Latin input source.

It's possible other keyboards are involved, but these are the ones where I have seen complaints and tested myself.

Hopefully this bug will be fixed in a future update.

(Appears to be fixed in 10.13.4)