It would be helpful for languages with common diacritics to have an option to not disregard them when searching the vault. Like in Swedish, å and ä are not just funky a’s but distinct letters that have their own keys on the keyboard.
Interesting. Bitwarden supports UTF-8, so it should be able to handle diacritics. I would suggest reporting this as a bug (“New Issue”) on GitHub. I suspect the culprit is how the Lunr.js search engine has been configured. It is possible to use non-English languages in Lunr.js, but as stated in the documentation, adding multiple languages can affect performance.