SAP ABAP Program RSTLAN_LANGUAGE_CHECK (Language Installation Check) is using

• Class (2)
• Data Element (2)
• Table/Structure Field (2)
• Function Module (1)
• Message Class (1)
• Message Number (2)
• Program (12)
• Table (1)

#	Object Type	Object Name	Object Description	Note
1	Class	CL_GUI_LIST_TREE	List Tree Control
2	Class	CL_TREE_CONTROL_BASE	Internal Tree Control Class