This module adds the ability to translate:
- Panels page title
- Panels pane titles
Right now there is no other module that provides this functionality, but you could implement theme_preprocess_panel_pane in your theme to get panels pane titles translated as explained in the issue related (see ahead).
This is not the best way to resolve this problem but while this functionality it's not in Panels this is a good option.
The translation are handled and inserted with Core's Translation interface.
Development is sponsored by Web Partners.