bellow is the charset in the jvm:
[Big5, CESU-8, COMPOUND_TEXT, EUC-CN, EUC-JP, EUC-KR, EUC-TW, GB18030, GB2312, GBK, hp-roman8, IBM-037, IBM-1006, IBM-1025, IBM-1026, IBM-1027, IBM-1041, IBM-1043, IBM-1046, IBM-1046S, IBM-1047, IBM-1088, IBM-1097, IBM-1098, IBM-1112, IBM-1114, IBM-1115, IBM-1122, IBM-1123, IBM-1124, IBM-1140, IBM-1141, IBM-1142, IBM-1143, IBM-1144, IBM-1145, IBM-1146, IBM-1147, IBM-1148, IBM-1149, IBM-1351, IBM-1362, IBM-1363, IBM-1363C, IBM-1364, IBM-1370, IBM-1371, IBM-1380, IBM-1381, IBM-1382, IBM-1383, IBM-1385, IBM-1386, IBM-1388, IBM-1390, IBM-1399, IBM-273, IBM-277, IBM-278, IBM-280, IBM-284, IBM-285, IBM-290, IBM-297, IBM-300, IBM-301, IBM-33722, IBM-33722C, IBM-420, IBM-420S, IBM-424, IBM-437, IBM-500, IBM-737, IBM-775, IBM-808, IBM-833, IBM-834, IBM-835, IBM-836, IBM-837, IBM-838, IBM-850, IBM-852, IBM-855, IBM-856, IBM-857, IBM-858, IBM-859, IBM-860, IBM-861, IBM-862, IBM-863, IBM-864, IBM-864S, IBM-865, IBM-866, IBM-867, IBM-868, IBM-869, IBM-870, IBM-871, IBM-874, IBM-875, IBM-897, IBM-918, IBM-921, IBM-922, IBM-924, IBM-927, IBM-930, IBM-932, IBM-933, IBM-935, IBM-937, IBM-939, IBM-942, IBM-942C, IBM-943, IBM-943C, IBM-947, IBM-948, IBM-949, IBM-949C, IBM-950, IBM-951, IBM-954, IBM-954C, IBM-964, IBM-971, ISCII91, ISO-2022-CN, ISO-2022-CN-GB, ISO-2022-JP, ISO-2022-KR, ISO-8859-1, ISO-8859-10, ISO-8859-13, ISO-8859-14, ISO-8859-15, ISO-8859-16, ISO-8859-2, ISO-8859-3, ISO-8859-4, ISO-8859-5, ISO-8859-6, ISO-8859-6S, ISO-8859-7, ISO-8859-8, ISO-8859-9, JIS0201, JIS0208, JIS0212, Johab, KOI8-R, KOI8-RU, KOI8-U, KSC5601, MacArabic, MacCentralEurope, MacCroatian, MacCyrillic, MacDingbat, MacGreek, MacHebrew, MacIceland, MacRoman, MacRomania, MacSymbol, MacThai, MacTurkish, MacUkraine, PTCP154, Shift_JIS, TIS-620, US-ASCII, UTF-16, UTF-16BE, UTF-16LE, UTF-32, UTF-32BE, UTF-32LE, UTF-8, UTF-8J, windows-1250, windows-1251, windows-1252, windows-1253, windows-1254, windows-1255, windows-1256, windows-1256S, windows-1257, windows-1258, windows-874, windows-932, **windows-936**, windows-949, windows-950, X-UnicodeBig, X-UnicodeLittle]
as long as u see, the windows-936 exists, but not the x-mswin-936,may be aspose.word should conside the compatibility of such envirentment.