Qlik Script Select SAPQUERY with Language selection

[aDao_Zhang]

I want to use select SAPQUERY to get data  from SAP.

Below are my script,  I want to select the description in language Afrikaans,  looks like SAP expect a single letter for Language,  if I use "a",   I got nothing,  I guess it was converted as upper case when query runs,  it went to language Arabic instead of Afrikaans.

How can I modify my query to make it works as expected?  thanks

Select SAPQUERY (QUERY (MATERIALTDESC), USERGROUP (DATA), WORKSPACE ( ), EXTERNAL_PRESENTATION (S),
OPTIONS (
(SELNAME LANG, KIND P, SIGN I, OPTION EQ, LOW a),
(SELNAME S_MATNR, KIND S, SIGN I, OPTION EQ, LOW MAT001)
));

Language	Language Specifications	Degree of Translation of Lang.	Lng ISO	Name of Language
a	S	0	AF	Afrikaans
D	S	1	DE	German
E	S	1	EN	English
A	L	0	AR	Arabic
S	S	2	ES	Spanish