Content submitters in an approval chain may be able to submit content in languages other than the language used for the folder's first approval chain.
Approval chains are only setup for one language at a time, so if it's missing for a language, content submitters will be able to publish with that language.
1) View the folder properties.
2) Select the language without the approval chain using the language dropdown.
3) Choose the approvals option and add the desired user(s) and/or group(s).