The QTextCodec class and the facilities in QTextStream make it easy to support many input and output encodings for your users' data. The application may occasionally have need for encodings other than the default local 8-bit encoding. Some Unicode text. Depending on the urgency, it may be useful to contact Trolltech technical support or ask on the qt-interest mailing list to see if someone else is already working on supporting the encoding. For details of writing your own QTextCodec, see the mail QTextCodec class documentation.
Localization is the process of adapting to local conventions such as date and time presentations.
In general, it is recommended that you do not attempt to localize images - choose clear icons that are appropriate for all localities, rather than relying on local puns or stretched metaphors. System Support Operating systems and window systems supporting Unicode are still in the early stages of development. The level of support available in the underlying system influences the support Qt provides on that platform, but applications written with Qt need not generally be too concerned with the actual limitations. Qt hides these and provides Unicode input and output. Filesystem conventions such as UTF-8 are under development in some Unix variants.