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What level of language you must prove, how to prove it, who is exempt, and what integration means in Swiss law.
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The short answer
Federal law requires at least B1 spoken and A2 written in a national language, proven by a recognised certificate unless you are exempt through mother tongue or schooling. Several cantons require more, so check the cantonal level before you book a test.
Evidence: Official source · Machine-readable data · As of 23 October 2026
Language
Integration
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Ten years of residence, a C permit, integration and language: the standard route.
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Read the guideGrandchildren of immigrants, children of naturalised parents, reintegration and more.
Read the guideResidence periods and language levels in all 26 cantons.
Read the guideFederal fees, totals for facilitated routes and how long each stage takes.
Read the guideNaturalisations per year and per canton, from the official federal statistics.
Read the guideQuestions
The State Secretariat for Migration publishes a quarterly list of recognised language certificates. A certificate counts if it was on the list when you filed your application.
No, if you completed at least five years of compulsory schooling, or upper secondary or tertiary education, in a national language. Native speakers of a national language are exempt as well.
Federal law requires familiarity with Swiss life, and the cantons decide how to check it. Some use a written knowledge test, others an interview or a civics conversation. The cantonal requirements page shows the rule in each canton.
Information, not legal advice. Naturalisation decisions are taken by the canton, the commune and the State Secretariat for Migration, and cantonal and communal practice varies. For an appeal or a complex case, consult a lawyer.
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