Do other languages have similar acronyms to 'tbh', 'imo', 'smh', etc?

Assuming you mean texting style acronyms, yeah, we have them in German and I'd assume in other languages too.

Alongside the stuff borrowed from English 1:1, there's stuff like bb for "Bis bald" (See you soon) or hdl for "hab dich lieb" (Love you)

I'd assume other languages do the same out of efficiency or laziness.