You should report this to the game developers also.
Throw a support ticket from here: http://support.aspyr.com/anonymous_requests/new
They don't seem to have a knowledge base answer for that bug.
It's added there.
I had also reported that special character crash bug (I'm unsing Spanish characters such as tilde) and from the Steam forums I know they have already solved it internally and are including the fix in a future patch (no ETA though).
Hello @HenAlm, @jsa1983, are either of you still experiencing this issue on an up to date system?
It now works for me. Kubuntu 17.10 with padoka ppa graphics drivers (Radeon RX 480) with es-ES locale.
I can now type ñ ' ` and other characters without crash.
Works for me as well with Kubuntu 16.10. So closing.
Nothing extracted yet.
It seems that in here the civ 5 crashes if I press § (also has ½) key. This is annoying as it is right below esc key and sometimes I hit it accidentaly.