Problem: You are trying to translate ACF fields, specifically a checkbox filter and their values, on your multilingual site. Solution: We recommend checking the following documentation on how to translate ACF fields using WPML: Translating ACF Field Labels with WPML.
If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If you still need assistance, please open a new support ticket at WPML support forum.