In theory, you can’t access the text symbols of one program into another program.
They are program dependent.
Nevertheless, if you need to do that, there is the following statement in ABAP.
DATA : li_textpool TYPE TABLE OF textpool.
READ TEXTPOOL 'SAPLLCPP' INTO li_textpool LANGUAGE sy-langu.
The table li_textpool contains all the texts defined for object SAPLLCPP. The wanted text can be retrieve with a READ TABLE statement.
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