I guess you want to write your page names in English but don't want to switch every time from Turkish layout to English. If so, we are not sure that the inserted characters will be with the necessary ASCII code when writing the names with the Turkish layout, even if 'e' in Turkish is 'e' in English. When you write your page names with the Turkish layout you are also not allowed to write symbols like [ ] ; ' , . / `
and so on.
For this reason, as well as for the reasons already mentioned previously, we have a constraint to write page names in English only, without using the above characters. Due to this constraint, you can not write 'i' with the turkish layout (nor with any other layout) in the page name text box.
The only and most trustworthy way is to write your names with the English layout. We are deeply sorry for this restriction.