Multilingual website SEO – Conflicts between translation plugins and SEO plugins
- Translation plugins and SEO plugins have different functions.
- Why does using two plugins sometimes lead to instability?
- Assign only one person to each function.
- What changes would occur with an official integration?
- First, view the actual printed output before looking at the settings screen.
- To check the areas covered by SOHO SEO.
- The order of selection is different between the new site and the existing site.
- Frequently Asked Questions.
- WordPress-related links
Can translation plugins and SEO plugins be used together? This is a question that most operators ask at least once.
The correct answer is that they can be used together. However, if the two plugins produce the same output, search engine optimization may be enhanced, but different signals will be generated.
You can use them together.
Translation plugins and SEO plugins have different functions.
The translation plugin creates multiple versions of the same page in different languages and links the addresses of each language page. It also manages the relationship between English pages and Korean pages, ensuring they are paired correctly.
The SEO plugin handles the title and description that appear in search results, the canonical URL, structured data, and the sitemap. However, because both plugins can generate language information and the sitemap, there is functional overlap.
Google instructs users to use different addresses for each multilingual page and to indicate the correspondence between languages and regions using the “hreflang” attribute. The “hreflang” attribute is a tag that informs search engines that there are other language versions of the page.
The problem is the overlap of functions.
Why does using two plugins sometimes lead to instability?
It is easy for operators to think that installing one more plugin will improve SEO further. However, if the language information for the same page and the sitemap are output twice, this does not strengthen the signal but can cause conflicts.
For example, one plugin might indicate that a Korean page is an alternative address for an English page. Another plugin might indicate that an English page is an alternative page for yet another address. Even a slight discrepancy in the settings can make it difficult for search engines to determine which signals to follow.
Duplication does not constitute reinforcement.
Google states that each language page must link to itself and to all other corresponding language pages. If a link exists in only one direction, the corresponding “hreflang” attribute may be ignored.
The sitemap is also the same. Yoast SEO explains that while various plugins or WordPress itself can generate sitemaps, problems can arise if multiple generators are active simultaneously.
Assign only one person to each function.
The criterion for avoiding conflicts is not the number of plugins. The key is to determine who ultimately outputs the same functionality.
Google explains that hreflang can be implemented in one of three ways: in HTML, in HTTP headers, or in XML sitemaps. Using all three methods does not provide any search engine optimization benefits and may only make management more difficult.
Therefore, the most straightforward configuration is to delegate language-specific addresses, hreflang tags, and sitemaps to the translation plugin, while assigning search-related titles and descriptions, and canonical tags to the SEO plugin.
Determine a single entity responsible for output.
More important than the name is the official integration. The translation plugin should pass the information from the SEO plugin to the translated version, and the SEO plugin should output this information without duplication.
What changes would occur with an official integration?
Translation plugins and SEO plugins are not substitute tools for each other. One creates relationships between languages, while the other manages the information needed for search engine optimization.
WPML handles hreflang attributes and language-aware sitemaps for translated content as built-in features. At the same time, it provides integrations that pass SEO information, such as titles and descriptions from Yoast SEO or Rank Math, to the translated versions.
The official documentation for TranslatePress and Rank Math shows a similar division of roles. They are designed to connect multilingual content with SEO elements, allowing users to manage language-specific SEO titles and descriptions, addresses, and image alt text.
Conversely, Polylang states that it cannot guarantee compatibility with all themes and plugins. While some popular plugins have separate compatibility codes, it is not possible to assume that any combination will work automatically.
The WPML SEO documentation states that while it supports Yoast SEO and Rank Math, it does not integrate with All in One SEO in the same way.
Whether or not official support is provided determines the choice.
First, view the actual printed output before looking at the settings screen.
The most common problem when trying to resolve this issue directly is not the settings menu. While each plugin’s interface appears normal, the actual page may contain two sets of “hreflang” attributes, or they may be completely missing.
It can be confusing to determine which plugin created a sitemap just by looking at the screen. This is because one plugin might create a basic sitemap, while another adds language-specific sitemaps, leading to overlap.
The results are more important than the appearance.
After completing the setup, it is necessary to verify the actual results.
- Check that each language page has only one set of `hreflang` attributes in the HTML head.
- Check whether the canonical URL points to the official URL in its own language.
- Check the sitemap to ensure that it includes the addresses of all language pages.
- Verify that each language page links to itself and to all of its corresponding pages.
This process becomes increasingly difficult for humans to repeat manually as the number of pages increases. In particular, for websites that are already in operation, it is first necessary to identify where the existing settings overlap with the functions of the new plugin.
Simply relying on the “automatic synchronization” feature can lead to data being missed or duplicated for an extended period. There is also a possibility that search engines may not properly identify pages in different languages.
If you need to continuously check the actual output, then separate points for checking the sitemap and post structure are necessary. SOHO SEO allows you to enable or disable both a standard XML sitemap and a Google News sitemap specifically for posts published within the last 48 hours.
The plugin also checks the sitemap and robots.txt files it provides once a day. If any problems are detected, the plugin sends a notification email. However, determining the final responsible party for hreflang tags or language-specific canonical URLs still requires consideration of the plugin combination and the actual output.
There are limitations to direct verification.
To check the areas covered by SOHO SEO.
Even after setting the administrator in the multilingual settings, the areas handled by the SEO plugin must be checked separately. SOHO SEO allows you to enable or disable both a standard XML sitemap and a Google News sitemap for posts within the last 48 hours, providing a way to verify the sitemap’s operational status. This feature does not replace the language-specific linking of hreflang or the final determination of canonical URLs; therefore, these items should be verified based on the official integration of translation plugins and SEO plugins, as well as the actual HTML.
At the post level, the Post SEO checklist allows you to check the SEO score for each post, as well as the featured image, title, author, mobile view, and site icon. The system also automatically outputs structured data for each post, including the title, image, author, publication date, modification date, and publisher information. Therefore, rather than being a tool for determining language relationships, this feature can be used to manage and verify site map and post structure elements, which are handled by SEO plugins.
The order of selection is different between the new site and the existing site.
If you have a new website, first choose a translation plugin. Then, it is safer to select an SEO plugin that is officially supported by the chosen translation plugin.
If you are using WPML, the structure is clear: WPML handles language URLs, hreflang attributes, and language-specific sitemaps, while Yoast SEO or Rank Math provides the SEO fields. If you are considering TranslatePress, you should first look at the officially integrated Rank Math combination.
If the site is already in operation, do not immediately add the plugin. First, you must verify in the actual HTML head and XML sitemap which entities output the `hreflang` and `canonical` tags and the sitemap.
After that, to ensure that only one plugin outputs the same function at a time, you only need to keep one of them.
Leave the language structure to the translation plugin.
Leave the search information to the SEO plugin.
It is best to avoid combinations that do not have official compatibility.
Frequently Asked Questions.
Q. What should be checked first for websites that are already in operation?
A. Do not directly add the plugin. Instead, verify in the actual HTML head that only one set of `hreflang` attributes exists, and that the `canonical` tag points to the correct language address. Also, check that the XML sitemap includes all language addresses.
Q. Can this problem be easily solved using a tool? What kind of tool should be used?
A. You can use a tool that allows you to verify the official integration of the plugin and the actual output results. However, the tool does not make decisions for you; therefore, you must individually designate the final responsible parties for hreflang, canonical URLs, and sitemaps.
Q. Is it necessary to use the translation plugin and the SEO plugin together?
A. It is not strictly necessary. However, if the language-specific pages and `hreflang` attributes are handled by a translation plugin, and the title, description, and canonical tags are handled by an SEO plugin, then they can be used together.
Q. After setting up multilingual SEO, how can I check the sitemap?
A. First, it is necessary to verify that the actual XML sitemap includes the address for each language without omission, and that the same functionality is not output by multiple generators.
If you are using SOHO SEO, you can enable or disable both the standard XML sitemap and the Google News sitemap for posts published within the last 48 hours. Additionally, the Site Error Check feature, provided by this plugin, checks the sitemap and robots.txt files provided by this plugin once a day, and sends a notification email if any issues are detected.