luceos The language vi (vietnamese?) is broken. This error originates either from a language pack or a language file shipped with level ranks.
clarkwinkelmann datlechin level ranks does not ship with Vietnamese, so the error must originate from a language pack. Which Vietnamese language pack are you using ?
clarkwinkelmann datlechin you must correct the quoting around the problematic line in the yaml translation file. A comma cannot be used unless it's inside a quoted string. There are tools you can use to verify the syntax of yaml files.
datlechin clarkwinkelmann I copied the en.yml file and renamed it vi.yml, I just changed the content to be translated, but it still got an error
clarkwinkelmann datlechin if you've got Yaml parse errors, you can check the syntax with a tool like https://yamlvalidator.com/ If the language has special characters, it might require more quotes than in English.