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This thread is resolved. Here is a description of the problem and solution.

Problem:
The client reported that some ACF Field Groups were duplicated when new languages were added to their site. They inquired whether it was safe to delete these duplicates and how to prevent such duplication in future projects.
Solution:
We identified that the duplication occurred because the ACF Field Groups were set as translatable in the WPML settings. To resolve this, we advised the client to set the ACF Field Groups to 'Not Translatable' in the WordPress Dashboard under WPML > Settings > Post Type Translation. This change prevents future duplications by ensuring that field groups do not create copies when new languages are added. The client should safely remove any existing duplicates, as they are no longer necessary.

If this solution does not apply to your case, or if it seems outdated, we recommend opening a new support ticket. We also 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. For further assistance, please visit our support forum at WPML Support Forum.

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This topic contains 6 replies, has 0 voices.

Last updated by Andreas 6 days, 22 hours ago.

Assisted by: Christopher Amirian.

Author Posts
April 29, 2026 at 1:19 pm #18002956

Andreas

Hi Christopher,

I’ve just tested it and everything is working great — thanks for that!

We’ve come across another issue related to field groups. Please let me know if you’d prefer that we create a new support ticket, but since you already have access to the site, I thought you might be able to guide me here.

It seems that some field groups were duplicated when we added the new languages. We’ve disabled the duplicates for now, and everything works as expected.

Is this a known behavior, and do you have any guidance on how to handle it? Also, would it be safe to delete the duplicated groups to keep things clean, or is there a recommended approach? Finally, is there a way to prevent this from happening again on future projects?

Thanks in advance!

April 29, 2026 at 1:21 pm #18002961

Christopher Amirian
WPML Supporter since 07/2020

Languages: English (English )

Timezone: Asia/Yerevan (GMT+04:00)

Hi,

May I ask you to give me the steps to see the duplicate issue? What should I do to see it?

That way I will be able to investigate further.

Maybe using a site like loom.com would help to have a screen recording of your desktop to understand what you do.

Thanks.

April 29, 2026 at 2:11 pm #18003211

Andreas

Hi Christopher,

Thanks!

When you go to ACF → Field Groups, you’ll see that some field groups, such as industries, appear 7–8 times. The same seems to apply to Products and a few other field groups, which appear to have been duplicated.

I’ve deactivated the duplicates and kept only one active version of each field group.

I’m not completely sure how this happened, so I wanted to check with you if this could be related to adding new languages. Is it possible that the ACF field groups were duplicated during that process?

CleanShot 2026-04-29 at 16.10.47@2x.png
April 29, 2026 at 2:57 pm #18003393

Christopher Amirian
WPML Supporter since 07/2020

Languages: English (English )

Timezone: Asia/Yerevan (GMT+04:00)

Hello,

Thank you for the clarification. Here is my educated guess:

When the ACF Field Group was set as translatable from WPML Settings, the groups were translated to the second language (either copied or translated, depending on the setting)

Now that we set that post type to "Not Translatable," all the copied and translated items show in the list as WPML creates a copy for each translation and now that it is not translatable all show in one language.

So please remove all the additional ones and with keeping the Field Group translation option to "Not Translatable" which is the default one, this should not happen again.

Thanks.

May 1, 2026 at 8:06 am #18007399

Andreas

Hi Christopher,

My apologies — I forgot to mention that this started happening a few months ago when we were implementing additional languages.

I have a question regarding the setup: how do you configure a group to be non-translatable?

Is it possible that the group was previously set as translatable when we added more languages, and could that have caused the fields to become duplicated somehow?

Thanks in advance for your help.

May 3, 2026 at 10:10 am #18009215

Christopher Amirian
WPML Supporter since 07/2020

Languages: English (English )

Timezone: Asia/Yerevan (GMT+04:00)

Hello,

That is correct, it might be the case that on WordPress Dashboard> WPML > Settings> Post Type Translation the "acf-field-group" row was set to as translatable (Which is not recommended) during the language addition, and that was the cause of the problem.

The good point is that now it is set as not translatable, and everything works as expected.

Thanks.

May 7, 2026 at 11:48 am #18020217

Andreas

Thanks Christopher.

Then we can close this ticket.

Thanks for the help and support.

Have a great day!

May 7, 2026 at 11:49 am #18020218

Andreas

Amazing help from Christopher!