Thank you very much for this update. Also the pager settings in WP Portfolio does not support multi-languages. I have modified the previous version for supporting turkish words.
You can find the download link in
WP Portfolio with Turkish Support and Previous Button
While speaking about the previous version, the pager always has “Next” button. Don’t have a “Previous” button. I also did modified the algorithm to support navigating back. You can also download this algoritm’s source code from the link above.
its not a translation issue. you have just set the names and descriptions collation in latin-swedish collation. this is the issue. I have changed the collations to utf-8 turkish (or you may choose utf-8 general) and the problem is solved. and i have written a post in turkish about this situation in my blog. You can use google translate to read it.
WP Charset Problem