Internal Table <VIM_READ_LANGUS> 
The table <VIM_READ_LANGUS> contains all languages which were read in in the translation table maintenance. It is used to select from the text table. If, for example, the translation languages were changed during table maintenance, the table <VIM_READ_LANGUS> tells you whether texts must still be read from the text table for the currently selected languages, or whether this has already been done.
Note
The structure of the table <VIM_READ_LANGUS> is not transparent and has no header. To access it, you must declare a variable as follows:
WA_LANGU LIKE T002-SPRAS.
When you have assigned a record of the table <VIM_READ_LANGUS> to the variable, you can access the field or modify the internal table via the variable.