System Variable based groups can be created for each language separately. Once the Groups are created you can view / generate reports for the languages separately. Go To:

• Login »  Surveys »  Reports »  Advanced Analysis »  Grouping/Segmentation

Under System Variable Based Grouping you will find the External ID option. Enter the appropriate language ID and create the Group.

Screenshot

External ID	Language
0	English
1	German
2	French
3	Dutch
4	Spanish
5	Portuguese
6	Italian
7	Russian
8	Arabic
9	Turkish
10	Thai
11	Hebrew
12	Baltic
13	Cyrillic
14	Chinese (Mainland - gb2312)
15	Chinese (Taiwan/HK - Big5)
16	Japanese
17	Korean
18	Armenian
19	Polish
20	Hungarian
21	Swedish
22	Finnish
23	Danish
24	Slovakian
25	Romanian
26	Flemish
27	Norwegian
28	Greek
29	Czech
30	Catalan
31	Croatian