ACF uses the field name to save its data and thus to avoid data loss and also enable synchronization of your fields it is recommended to enable field group translation.
Each language will require it’s own translation of a field group. You should create your field group in the default language and then use the ‘Duplicate’ tool to create a duplicate field group in the new language. You can then edit the field’s label, settings but the field’s name must remain constant across all translations.
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