| Abbreviation |
C1 |
| German (de) |
Einstufung Schweiz 4. Klasse |
| English (en) |
Swiss 4th class |
| Spanish (es) |
Clase 4ª (Suiza) |
| French (fr) |
Niveau 4 - Suisse |
| Works with "C1" in instrumentation |
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| Works with "C1" in instrumentation/info |
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| Works with "C1" in evaluation level |
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| Works with "C1" in additional info/contents |
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| Works with "C1" in supplementary text |
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| Books with "C1" in additional info/contents |
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