Example of removing a locale and its assets

RemoveLocale.cs

public static void RemoveLocale(LocaleIdentifier localeIdentifier)
{
    foreach (var collectionStrings in LocalizationEditorSettings.GetStringTableCollections())
    {
        var table = collectionStrings.GetTable(localeIdentifier);
        if (table != null)
        {
            collectionStrings.RemoveTable(table);
            AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(table));
        }
    }
 
    foreach (var collectionAssets in LocalizationEditorSettings.GetAssetTableCollections())
    {
        var table = collectionAssets.GetTable(localeIdentifier);
        if (table != null)
        {
            collectionAssets.RemoveTable(table);
            AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(table));
        }
    }
 
    var locale = LocalizationEditorSettings.GetLocale(localeIdentifier);
    if (locale != null)
    {
        LocalizationEditorSettings.RemoveLocale(locale);
        AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(locale));
    }
}