Used BING translate to create a line of Turkish text, then added it to the version 8.18 VP subtitle interface and saved it as an SSA file.
When restored later it looked the same, but for size. That could be changed under the format tab.
If you feel that this isn't working correctly file a bug report. Click the chevron at the top-right of the VP window for a drop-down list. SEND BUG REPORT.
Include specific text examples.