Hello Highlander. I'm a diagnosed Coeliac so I'd like to offer some advice.
First of all if your wife suspects that she may be suffering from this condition on no account should she start a gluten free diet before being properly diagnosed as this can distort her test results. Her doctor will arrange a blood test first and if that shows a possibility of Coeliac Disease she will need to have an endoscopic biopsy to confirm the condition. It's relatively painless. She also may be given an MRI to check for inflamation in the intestines. Only when she has a confirmed diagnosis should she take up a gluten free diet.
If she is Coeliac, she can join their society in the UK, they will send her a booklet with all the gluten free foods available, listed by popular supermarkets to make things even easier. I wish her all the best, life is not quite so easy for Coeliacs in Turkey but ways can be found to cope. Feel free to email me if you need any help.