Bilingual (multilingual) language (English and Bulgarian) for 800xA system and Touch Panel 10.4" PP877

Does Touch Panel 10.4" PP877 HMI supports bilingual language (English and Bulgarian) when collecting alarm and events via OPC AE server using Alarm cond and Simple event detector function block?

We also must have bilingual language (English and Bulgarian) on 800xA SCADA system. As I understood:

1. Alarms and events translations are realized via alarm and event translator and string messages in PLC in form ‘||<NLS resource name>’ . When changing Windows system locale on computer (Operator station) the text will change as defined in translator?

Text on buttons and objects in PG2 are realized via expression editor and switching texts on English and Bulgarian depending on value of some tag?

What about for example: for digital signal we use graphic element for signal status and signal text is transferred from PLC. Does 800xA have functionality to translate these text same way as alarm and event translator functionality. How can this be done?

Thanks in advance