Centripetal forces: Switzerland's historical neutrality, and shared cultural symbols (such as the Swiss flag and Swiss chocolate) contribute to centripetal forces that help unify the country.
https://time.com/6282335/ending-switzerland-neutrality-thomas-borer-interview/
Centrifugal forces: Switzerland's language diversity, with its four distinct linguistic groups of German, French, Italian, and Roman speakers, can act as a centrifugal force by fostering divisions and communication challenges among these groups due to their unique cultural and linguistic identities.
Religion:
Catholic-Protestant Divide: Switzerland historically divides into Catholic-majority regions in the central and western parts and Protestant-majority regions in the north and east, leading to geographic, cultural, and political distinctions.
https://www.familysearch.org/en/wiki/Switzerland_Church_Records
Ethnicity:
Ethnic and Linguistic Regional Pattern: Switzerland's language diversity correlates with regional ethnic identities: German-speaking in the central and east, French-speaking in the west, Italian-speaking in the south, and a Romansh-speaking minority in Grisons, influencing cultural diversity and socioeconomic variation
https://alphaomegatranslations.com/foreign-language/the-languages-of-switzerland/