I have a magento 2.1.6 installation, and i have add greek language. I noticed an issue that if the backend language switched to greek, then i cannot add manually an order from backend. If the language switched to the default english, then i can add without problems the order.
What do you suggest to check?
You have to run deployment command after set as greek language.
Run all of three below command using terminal,
php bin/magento setup:static-content:deploy el_GR en_US
php bin/magento setup:di:compile php bin/magento indexer:reindex php bin/magento cache:clean
Remove Var/generation folder and check again.
If issue solved, Click Kudos/Accetp as solutions.