Yealink SIP-T2 SERIES Administrator's Manual page 224

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
The following shows a portion of the note language pack ―1.English_note.xml‖ for
the web user interface (take SIP-T23G IP phones for example):
3. Save the language file and place it to the provisioning server (e.g., 192.168.10.25).
4. Specify the access URL of the note language pack of the web user interface.
If you want to add a new language (e.g., Wuilan) to IP phones, prepare the language
file named as ―12.Wuilan.js‖ and ―12.Wuilan_note.xml‖ for downloading. After update,
you will find a new language selection ―Wuilan‖ on the web user interface:
Settings->Preference->Language, and new note information is displayed in the icon
when the new language is selected.
Procedure
Loading language pack can only be performed using the configuration files.
Configuration File
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<y0000000000xx>.cfg
Specify the access URL of
the custom language pack
for web user interface.
Parameter:
wui_lang.url
Specify the access URL of
the custom note language
pack for web user interface.
Parameter:
wui_lang_note.url