Zoom Player has full multilingual support for every dialog and text entry. Using this dialog you can select additional language files. The first entry is always English and it represents the internal language. You may also see an additional English entry, this is the external files used by translators to translate Zoom Player into other languages (if you are using English, use the first entry in the list).
To download additional language files, click on the "Download Additional Languages" button or visit the Zoom Player Language Page. On the download page you will notice self-installing language executable files in various languages. Language files may not be updated as quickly as Zoom Player itself. However, older language files are still valid in newer versions of Zoom Player.
If you would like to assist in translating Zoom Player to additional language files, visit the Zoom Player Forum for more information.