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

Problem:
After updating WPML, you receive a persistent error message stating 'Some taxonomy terms are out of sync between languages', even after clicking 'Update Taxonomy Hierarchy'.
Solution:
If you're experiencing this issue, we recommend you follow these steps:
1. Take a backup of your site's database.
2. Navigate to WPML -> Support -> Troubleshooting.
3. At the bottom of the screen, click the 'Remove all messages and notifications' button.
4. Check if the problem is resolved.

If this solution does not resolve your issue or seems outdated, please check the related known issues, verify the version of the permanent fix, and confirm that you have installed the latest versions of themes and plugins. If the problem persists, we highly recommend opening a new support ticket at WPML support forum.

This is the technical support forum for WPML - the multilingual WordPress plugin.

Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.

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Last updated by Itamar 3 weeks, 3 days ago.

Assisted by: Itamar.

Author Posts
April 9, 2025 at 3:10 pm #16914654

fabio-luizT

Background of the issue:
I updated to the latest version of WPML and started receiving a message about taxonomy terms being out of sync between languages. The message suggests clicking the 'Update Taxonomy Hierarchy' button to sync taxonomies. I noticed that the taxonomy is no longer present in the URL link.

Symptoms:
The message 'Some taxonomy terms are out of sync between languages' appears, and after clicking 'Update Taxonomy Hierarchy', the message 'The taxonomy hierarchy is now synchronized' appears, but the error persists on the panel.

Questions:
What do I need to do to resolve the persistent error message about taxonomy terms being out of sync?
Is there any documentation that can help with resolving this issue?

April 9, 2025 at 3:25 pm #16914879

Itamar
WPML Supporter since 02/2016

Languages: English (English ) Hebrew (עברית )

Timezone: Asia/Jerusalem (GMT+03:00)

Hi,

This ticket has been inactive for quite a while. I didn't get a reply from you. So, I've transformed this chat into a support ticket because you may still need our help.

Do you mean that although the taxonomies were synced, the message does not go away?

If you need further help with this, please share the access details to your site with me. I'm enabling a private message for the following reply.
Privacy and Security Policy
We have strict policies regarding privacy and access to your information. Please see:
https://wpml.org/purchase/support-policy/privacy-and-security-when-providing-debug-information-for-support/
**IMPORTANT**
- - Please backup the site files and database before providing us access. --
-- If you have a staging site where the problem can be reproduced, it is better to share access to the staging site.--

Regards,
Itamar.

April 10, 2025 at 12:42 pm #16918696

Itamar
WPML Supporter since 02/2016

Languages: English (English ) Hebrew (עברית )

Timezone: Asia/Jerusalem (GMT+03:00)

Hi, and thanks for the access details.

However, I get this error when I try to log in:

Erro: a senha informada para o usuário WPML está incorreta. 

Please check and correct this.
I'm enabling a private message to the following reply.

Regards,
Itamar.

April 15, 2025 at 12:22 pm #16933974

Itamar
WPML Supporter since 02/2016

Languages: English (English ) Hebrew (עברית )

Timezone: Asia/Jerusalem (GMT+03:00)

Hi, and thanks for the access details.

I can see the problem on your site. The message about the taxonomy terms that are out of sync between languages can not be disabled. This, although everything seems to be synced.

Please try WooCommerce Multilingual & Multicurrency and WPML troubleshooting options. Here is what you need to do.

WooCommerce Multilingual & Multicurrency options
1. Backup the DB of your site.

2. Go to WooCommerce -> WooCommerce Multilingual & Multicurrency -> Settings, and click the Troubleshooting link. The direct link is this:
hidden link

3. Click the following options and wait for the process to end.
- Sync products "gallery images"
- Sync products categories (display type, thumbnail)
- Sync removed product meta from original products to translations

If it does not help, proceed to the WPML troubleshooting section.

1. Take a backup of the DB of your site.

2. Go to WPML -> Support -> Troubleshooting (link)

3. Once on the troubleshooting screen, press the following buttons and check if it helps. Press each button at a time and wait for the process to complete.

- 'Synchronize posts taxonomies' for All the post types

- 'Clear the cache in WPML'

- 'Remove ghost entries from the translation tables'

- 'Fix element_type collation'

- 'Fix WPML tables collation'

- 'Set language information'

- 'Reset languages' Press this button only if you didn't add a custom language!

- 'Fix terms count'

- 'Fix post type assignment for translations'

- 'Cleanup and optimize string tables'

- 'Clear invalid strings'

*** Please backup your database before using this.***

Regards,
Itamar.

April 16, 2025 at 1:25 am #16936413

fabio-luizT

Itamar, hope thi smessgae finds you well.
I have followed carefully every single step.
The message persists. Not solved yet.
What can be done next?

April 16, 2025 at 3:10 pm #16939786

Itamar
WPML Supporter since 02/2016

Languages: English (English ) Hebrew (עברית )

Timezone: Asia/Jerusalem (GMT+03:00)

Hi, and thanks for trying my suggestions.

I'm consulting our second-tier supporters about this problem and will update you here once I have their reply.

I appreciate your patience.
Itamar.

April 17, 2025 at 7:47 pm #16945731

Itamar
WPML Supporter since 02/2016

Languages: English (English ) Hebrew (עברית )

Timezone: Asia/Jerusalem (GMT+03:00)

Hi,

Our second-tier supporter suggests trying the following.

1. Take a backup of your site's database in case something goes wrong.

2. Go to WPML -> Support -> Troubleshooting and scroll to the bottom of the screen.

3. Click the 'Remove all message and notification' button. Please see the attached screenshot.

4. Check if the problem is solved.

Please let me know how it goes.

Regards,
Itamar.

Screenshot 2025-04-16 at 16.41.16.png