For the attention of hosting providers using H-Sphere 2.1 with non-English language support:

To ensure adequate support for non-English encoding in H-Sphere 2.1, system administrators are requested to edit the ~cpanel/shiva/psoft_config/hsphere.properties configuration file. The line
DB_URL = jdbc:postgresql://127.0.0.1/hsphere
should be replaced with the line
DB_URL = jdbc:postgresql://127.0.0.1/hsphere?charSet=<YOUR_LANGUAGE_ENCODING>

For instance, Russian language support takes the following line:
DB_URL = jdbc:postgresql://127.0.0.1/hsphere?charSet=WIN

The need for these changes has been triggered by switching to a newer PostgreSQL driver that includes a fix for the timestamp data bug causing incorrect billing calculation.