Did you modify the code of your Oxwall install?

I don't think so aka_le_Mulder

Do you have instructions on how can this issue be reproduced? Could you provide us with them?

Hi Micheal,

What do you mean with instruction on how the issue be reproduced?
Sorry but my english isn't that good so sometimes i need more explanation .
Can you pls rephraze the question?
 cheers

Michael asks you about what actions in language section did you perform to get an sql error shown on your screen? He needs this to find an issue faster.

i didn't perform any actions there.
One day i just went to check out that section in my admin area and that is when i noticed the error.

I never play or experiment with any codes since i don't know anything about it.

There are a few things not working properly on my site and i have no idea how to solve them.

Topic was moved from Installation Troubleshooter and Server setup.

Yves,

Try to reupload default language dump. You can take it from default version. 

Hi Den,

I deleted and re-installed oxwall again a few days ago.
The error is gone now.
Thank you