Recommend another keyboard that will let me switch quickly between the five languages that I have installed, supports swipe in all those languages, has cursor navigation, and does not promote the use of emojis in conversation, has rich set of characters including diacritic marks for Hebrew and Arabic. If it pops up my selected text as an autocomplete selection that would be nice too.

I would be willing to pay for such a keyboard. Alas the free Google keyboard does all that. For me, the only feature missing is language selection when attaching a hardware bluetooth keyboard. I have to switch to the default Samsung keyboard to be able to switch languages from the hardware keyboard.