Hi,
Thank you for the details.
1) We’ve followed your steps, but still it’s impossible to reproduce the problem. Could you provide a link to the page where it occurs, please?
4) It is possible that there is a conflict with your current theme or some of your plugins. To detect the possible reason, please:
a) Try activating a standard WordPress theme for a while (Twenty Fourteen, Twenty Fifteen) and check if the problem remains.
b) Try deactivating all of your plugins except Multilanguage and also check if the problem is still present. If it is not, activate the plugins one-by-one, meanwhile checking, after which plugin activation the problem appears again.
Sincerely,
BestWebSoft Support Team